2015A&A...581A.140S

Query : 2015A&A...581A.140S

2015A&A...581A.140S - Astronomy and Astrophysics, volume 581A, 140-140 (2015/9-1)

The VISTA Orion mini-survey: star formation in the Lynds 1630 North cloud.

SPEZZI L., PETR-GOTZENS M.G., ALCALA J.M., JORGENSEN J.K., STANKE T., LOMBARDI M. and ALVES J.F.

Abstract (from CDS):

The Orion cloud complex presents a variety of star formation mechanisms and properties and is still one of the most intriguing targets for star formation studies. We present VISTA/VIRCAM near-infrared observations of the L1630N star-forming region, including the stellar clusters NGC2068 and NGC2071 in the Orion molecular cloud B, and discuss them in combination with Spitzer data. We select 186 young stellar object (YSO) candidates in the region on the basis of multi-color criteria, confirm the YSO nature of the majority of them using published spectroscopy from the literature, and use this sample to investigate the overall star formation properties in L1630N. The K-band luminosity function of L1630N is remarkably similar to that of the Trapezium cluster, i.e., it presents a broad peak in the range 0.3-0.7M☉ and a fraction of substellar objects of ∼20%. The fraction of YSOs still surrounded by disk/envelopes is very high (∼85%) compared to other star-forming regions of similar age (1-2Myr), but includes some uncertain corrections for diskless YSOs. Yet, a possibly high disk fraction, together with the fact that 1/3 of the cloud mass has a gas surface density above the threshold for star formation (∼129M☉/pc2), points toward a still ongoing star formation activity in L1630N. The star formation efficiency (SFE), star formation rate (SFR), and density of star formation of L1630N are within the ranges estimated for Galactic star-forming regions by the Spitzer core to disk and Gould's Belt surveys. However, the SFE and SFR are lower than the average value measured in the Orion A cloud and, in particular, lower than that in the southern regions of L1630. This might suggest different star formation mechanisms within the L1630 cloud complex.

Abstract Copyright: ∼

Journal keyword(s): surveys - stars: pre-main sequence - open clusters and associations: individual: L1630N - stars: formation - stars: protostars - ISM: clouds

VizieR on-line data: <Available at CDS (J/A+A/581/A140): tablea1.dat tablea2.dat>

Nomenclature: Table A.2: [SPA2015] NNN N=186.

Simbad objects: 221

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Number of rows : 221
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7062 0
2 NGC 1333 OpC 03 29 11.3 +31 18 36           ~ 1450 1
3 IC 348 OpC 03 44 31.7 +32 09 32           ~ 1392 1
4 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4415 0
5 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
6 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1619 1
7 NAME Ori Complex Cld 05 35.3 -05 23           ~ 441 0
8 NAME Ori A MoC 05 38 -07.1           ~ 3011 0
9 LDN 1641 MoC 05 39.0 -07 00           ~ 479 0
10 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 703 1
11 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1376 0
12 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1154 1
13 LDN 1630 DNe 05 45.5 -00 59           ~ 381 0
14 [SPA2015] 169 Y*? 05 45 33.825 +00 39 36.76           ~ 1 0
15 2MASS J05454194-0012053 TT* 05 45 41.9508842448 -00 12 05.424975396           K5.5 19 0
16 2MASS J05454279-0001018 Y*O 05 45 42.7972476336 -00 01 01.860730680           M5.5 5 0
17 Kiso A-0904 170 TT* 05 45 44.3760205920 +00 22 58.260162900   16.91 15.77 15.51   M1 13 0
18 2MASS J05454558+0025570 LP? 05 45 45.5839204728 +00 25 56.993847852           ~ 2 0
19 2MASS J05454955-0008387 Y*O 05 45 49.5585439344 -00 08 38.891830452           M5 4 0
20 [SPA2015] 170 Y*? 05 45 50.636 +00 06 29.88           ~ 1 0
21 [SPA2015] 175 Y*? 05 45 52.811 +00 27 22.86           ~ 1 0
22 KHA 174 TT* 05 45 53.1173374176 -00 13 25.004747784   18.00 16.73     M1 20 0
23 EM* RJHA 9 TT* 05 45 53.5552860072 +00 33 08.764993764     17.5     M2 12 0
24 2MASS J05455468+0021222 Y*O 05 45 54.6839675208 +00 21 22.237093872           ~ 3 0
25 2MASS J05455512+0011394 Y*O 05 45 55.1327810568 +00 11 39.394067280           M5.5 4 0
26 [SPA2015] 184 Y*? 05 45 55.417 +00 24 36.07           ~ 1 0
27 2MASS J05455631+0007085 TT* 05 45 56.3186248680 +00 07 08.515164252           K7.5 15 0
28 2MASS J05455672-0000253 Y*O 05 45 56.7281169744 -00 00 25.401201480           M3 5 0
29 EM* LkHA 296 TT* 05 45 57.3896595552 +00 20 22.172250300   16.5 15.7     K7 19 0
30 2MASS J05455762+0007211 Y*O 05 45 57.6262746408 +00 07 21.088256988           M5.5 4 0
31 2MASS J05455793+0002485 TT* 05 45 57.9305218392 +00 02 48.608540160           M4.5 5 0
32 EM* LkHA 297 TT* 05 46 00.1784237136 +00 03 07.049171628   18.5       M4 14 0
33 2MASS J05460253+0017288 Y*O 05 46 02.5363011960 +00 17 28.826791692           M7 4 0
34 2MASS J05460363-0014493 Y*O 05 46 03.63 -00 14 49.3           ~ 66 0
35 2MASS J05460457+0000381 TT* 05 46 04.5780377400 +00 00 38.058768216           M2 12 0
36 EM* LkHA 298 TT* 05 46 04.63704 +00 04 58.1484   16.88 15.42 14.82 13.32 K6 27 0
37 IRAS 05435-0015 Y*O 05 46 04.775 -00 14 16.51           ~ 73 0
38 2MASS J05460722-0013231 Y*O 05 46 07.227 -00 13 23.17           ~ 11 0
39 [SPA2015] 176 Y*? 05 46 07.227 -00 11 34.91           ~ 1 0
40 NAME HH 24-26 MoC 05 46 07.34 -00 13 31.3           ~ 35 0
41 2MASS J05460787-0010014 Y*O 05 46 07.873 -00 10 01.41           ~ 33 0
42 HBC 502 TT* 05 46 07.8799942272 -00 11 56.887013256     14.5     K3 46 0
43 2MASS J05460852-0010390 Y*O 05 46 08.528 -00 10 39.05           ~ 20 0
44 EM* LkHA 299 TT* 05 46 09.27000 +00 13 32.6136   17.16 15.45 15.61   M1 15 0
45 2MASS J05460960-0003312 Y*O 05 46 09.6062224872 -00 03 31.281751872           M1.5 7 0
46 2MASS J05461030-0000066 Y*O 05 46 10.3037856072 -00 00 06.730989444           M2 5 0
47 2MASS J05461134-0007550 Y*O 05 46 11.3639849856 -00 07 55.278861528           M3.5 5 0
48 2MASS J05461162-0006279 Y*O 05 46 11.6126700048 -00 06 28.024161084           ~ 18 0
49 2MASS J05461186+0032259 Y*O 05 46 11.8695187200 +00 32 25.836551232           K2 18 0
50 2MASS J05461218+0003498 Y*O 05 46 12.1828652064 +00 03 49.803351480           ~ 3 0
51 2MASS J05461226-0008078 Y*O 05 46 12.2611158624 -00 08 07.821023784           M7 7 0
52 2MASS J05461299-0008148 Y*O 05 46 13.0080758784 -00 08 14.860518180           M4.5 7 0
53 V* V1647 Ori Or* 05 46 13.1370578472 -00 06 04.885093296     18.1     M3.9 286 1
54 HOPS 328 Y*O 05 46 13.4512415808 +00 10 32.895570720           ~ 3 0
55 2MASS J05461350-0008556 Y*O 05 46 13.510 -00 08 55.68           ~ 7 0
56 2MASS J05461355+0023491 Y*O 05 46 13.559 +00 23 49.14           ~ 3 0
57 2MASS J05461423-0005261 Y*O 05 46 14.234 -00 05 26.20           ~ 7 0
58 2MASS J05461447+0020243 TT* 05 46 14.4893643528 +00 20 24.331348860           M4 6 0
59 2MASS J05461674+0007134 Y*O 05 46 16.7497745616 +00 07 13.342029528           M5 10 0
60 CRTS J054618.0+001212 Y*O 05 46 18.0164501448 +00 12 12.221809128     16.77     M1.7 13 0
61 2MASS J05461829+0006578 TT* 05 46 18.2992725000 +00 06 57.780058968           K5.5 15 0
62 2MASS J05461859+0007079 Y*O 05 46 18.6009670752 +00 07 07.920841764           M3.5 4 0
63 V* V2764 Ori TT* 05 46 18.8940183048 -00 05 38.169480768   15.3 14.4     K7 23 0
64 EM* LkHA 300 TT* 05 46 19.0551946080 +00 03 29.485773036   18.0       K6 26 0
65 [SPA2015] 166 Y*? 05 46 19.435 +00 35 44.45           ~ 1 0
66 EM* LkHA 301 TT* 05 46 19.4689575480 -00 05 20.030650836   15.4 14.6     K2.5 40 0
67 2MASS J05462087+0008094 TT* 05 46 20.8775190240 +00 08 09.307184676           K8 11 0
68 2MASS J05462106-0012092 Y*O 05 46 21.063 -00 12 09.21           ~ 3 0
69 [SPA2015] 171 Y*? 05 46 21.758 +00 37 08.15           ~ 1 0
70 2MASS J05462181+0012092 Y*O 05 46 21.8234176704 +00 12 09.201700584           ~ 3 0
71 EM* LkHA 302 TT* 05 46 22.4333214840 -00 08 52.633597092     15.1     K2 35 0
72 2MASS J05462298+0004264 TT* 05 46 22.9902233760 +00 04 26.478857172           M2 11 0
73 2MASS J05462509+0005412 Y*O 05 46 25.1123581848 +00 05 41.208952740           K7.5 13 0
74 2MASS J05462571+0023413 Y*O 05 46 25.71072 +00 23 41.3304           ~ 9 0
75 2MASS J05462588+0009319 TT* 05 46 25.8853260600 +00 09 31.896703764           M3.5 13 0
76 2MASS J05462591+0007092 Y*O 05 46 25.9198930752 +00 07 09.149997252           ~ 3 0
77 [STS2013] 92011 Y*? 05 46 26.248 -00 04 44.76           ~ 3 0
78 2MASS J05462665+0031074 TT* 05 46 26.6574243480 +00 31 07.448902752           K7 13 0
79 2MASS J05462723+0001499 Y*O 05 46 27.237 +00 01 49.95           ~ 3 0
80 [SPA2015] 168 Y*? 05 46 27.303 -00 21 40.75           ~ 1 0
81 2MASS J05462733+0008520 Y*O 05 46 27.3451215528 +00 08 51.762898968           ~ 5 0
82 2MASS J05462830+0003307 Y*O 05 46 28.305 +00 03 30.73           ~ 3 0
83 2MASS J05462836+0012269 Y*O 05 46 28.3660202280 +00 12 26.904167172           M3.5 4 0
84 2MASS J05462886+0013306 Y*O 05 46 28.86864 +00 13 30.6624           M0.5 10 0
85 2MASS J05462913+0002590 Y*O 05 46 29.1347674320 +00 02 59.078025564           ~ 9 0
86 2MASS J05462958+0010572 Y*O 05 46 29.5877457360 +00 10 57.160356600           M5.5 9 0
87 2MASS J05463005+0012096 TT* 05 46 30.0600239496 +00 12 09.609575688           M1.5 12 0
88 2MASS J05463064-0002349 Y*O 05 46 30.645 -00 02 34.97           ~ 33 0
89 [SPA2015] 186 Y*? 05 46 30.754 +00 31 00.77           ~ 1 0
90 IRAS F05439+0024 TT* 05 46 31.0591924104 +00 25 33.743738820           M4.5 15 0
91 2MASS J05463109+0006058 Y*O 05 46 31.091 +00 06 05.84           ~ 3 0
92 2MASS J05463154+0005065 Y*O 05 46 31.542 +00 05 06.58           ~ 3 0
93 2MASS J05463155+0006399 Y*O 05 46 31.5690957144 +00 06 39.985672068           M1.5 10 0
94 2MASS J05463171+0025081 Y*O 05 46 31.7175869520 +00 25 08.070289320           M3.5 10 0
95 2MASS J05463271+0008517 Y*O 05 46 32.7188046000 +00 08 51.751927428           ~ 6 0
96 2MASS J05463318+0000021 Y*O 05 46 33.188 +00 00 02.15           ~ 12 0
97 2MASS J05463328+0002518 TT* 05 46 33.2898861264 +00 02 51.958926024           K4 21 0
98 2MASS J05463330+0022554 Y*O 05 46 33.3144267432 +00 22 55.474589676           ~ 3 0
99 [SSC75] M 78 4 TT* 05 46 34.5409903448 +00 06 43.466273540           K4 10 0
100 2MASS J05463489+0004206 TT* 05 46 34.9036243488 +00 04 20.760705660           M4 13 0
101 2MASS J05463610+0006268 Y*O 05 46 36.1095562872 +00 06 26.871222816           M0 9 0
102 EM* LkHA 304 TT* 05 46 37.0684320048 +00 01 21.882730224     16     K5.5 26 0
103 2MASS J05463751+0006546 Y*O 05 46 37.5307094688 +00 06 54.581624028           ~ 4 0
104 2MASS J05463753+0008004 Y*O 05 46 37.5408177144 +00 08 00.479051808           ~ 3 0
105 2MASS J05463755+0000338 Y*O 05 46 37.551 +00 00 33.80           ~ 20 0
106 [MGM2012] 3157 Y*? 05 46 37.87 -00 18 58.2           ~ 2 0
107 2MASS J05463832+0005486 Y*O 05 46 38.3260971000 +00 05 48.792793740           M6 6 0
108 2MASS J05463840+0015116 Y*O 05 46 38.3996320128 +00 15 11.564494632           M5.5 4 0
109 2MASS J05463856+0022059 TT* 05 46 38.5703780736 +00 22 06.041892576           M1 11 0
110 2MASS J05463988+0006449 Y*O 05 46 39.8946374064 +00 06 44.957869416           M2 4 0
111 2MASS J05464014+0010388 Y*O 05 46 40.150 +00 10 38.80           ~ 3 0
112 2MASS J05464076+0027225 TT* 05 46 40.76784 +00 27 22.5108           M3 12 0
113 2MASS J05464088+0022390 Y*O 05 46 40.882 +00 22 39.00           ~ 4 0
114 2MASS J05464247+0023009 Y*O 05 46 42.478 +00 23 00.99           ~ 7 0
115 2MASS J05464384+0015323 TT* 05 46 43.8478594872 +00 15 32.287272444           M2 9 0
116 2MASS J05464408+0018031 TT* 05 46 44.0933464440 +00 18 03.081565728           K5 14 0
117 2MASS J05464483+0016597 TT* 05 46 44.8407868536 +00 16 59.793729240           M1 12 0
118 2MASS J05464500+0011327 Y*O 05 46 45.0044820048 +00 11 32.840814048           M4.5 4 0
119 2MASS J05464503+0005339 Y*O 05 46 45.0471371832 +00 05 33.963277056           M0.5 7 0
120 2MASS J05464514+0003464 Y*O 05 46 45.1537852560 +00 03 46.497579120           M2.5 8 0
121 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 375 0
122 EM* LkHA 305 TT* 05 46 45.8182009824 +00 17 02.469413148   16.5 15.1     M0e 17 0
123 2MASS J05464687+0009076 TT* 05 46 46.8763599936 +00 09 07.682257080     17.0     M0 15 0
124 2MASS J05464696+0007091 Y*O 05 46 46.9691255616 +00 07 09.104557188           M2.0 10 0
125 NAME LDN 1630N Cl* 05 46 47.0 +00 09 50           ~ 14 1
126 2MASS J05464703+0000265 Y*O 05 46 47.037 +00 00 26.57           ~ 11 0
127 2MASS J05464729+0004069 Y*O 05 46 47.29656 +00 04 06.9924           ~ 11 0
128 2MASS J05464740+0012592 Y*O 05 46 47.4033406824 +00 12 59.186208888           ~ 8 0
129 2MASS J05464855+0021281 Y*O 05 46 48.552 +00 21 28.17           K6.5 7 0
130 2MASS J05464872+0021383 Y*O 05 46 48.7353655104 +00 21 38.320300116           M4.5 4 0
131 2MASS J05464908+0028383 Y*O 05 46 49.0920538320 +00 28 38.391818484           M5 4 0
132 EM* LkHA 306 Y*O 05 46 50.2232885760 +00 04 39.654816024   17 16.5     ~ 15 0
133 2MASS J05465046+0022226 Y*O 05 46 50.466 +00 22 22.69           ~ 4 0
134 2MASS J05465119+0018082 Y*O 05 46 51.1955517144 +00 18 08.267914404           M5.5 4 0
135 2MASS J05465139+0019471 Y*O 05 46 51.399 +00 19 47.19           M2 8 0
136 2MASS J05465148+0019213 TT* 05 46 51.4828777824 +00 19 21.330627240           M3.5 11 0
137 2MASS J05465185+0019385 Y*O 05 46 51.8558166288 +00 19 38.581916556           M4 5 0
138 2MASS J05465241+0020016 TT* 05 46 52.4159850048 +00 20 01.665353868           K9 14 0
139 2MASS J05465262+0022085 Y*O 05 46 52.630 +00 22 08.56           ~ 3 0
140 2MASS J05465268+0006088 Y*O 05 46 52.6893336312 +00 06 08.800956612           ~ 3 0
141 2MASS J05465357+0000057 Y*O 05 46 53.5863018720 +00 00 05.796028188           M1.9 8 0
142 2MASS J05465372+0026313 Y*O 05 46 53.7253336008 +00 26 31.249466988           M7e 4 0
143 2MASS J05465376+0000339 Y*O 05 46 53.7794879280 +00 00 34.060004784           M3.1 8 0
144 2MASS J05465443+0021141 Y*O 05 46 54.4432356072 +00 21 14.232584484           M4.1 10 0
145 2MASS J05465509+0023345 Y*O 05 46 55.092 +00 23 34.60           ~ 8 0
146 2MASS J05465712+0025357 Y*O 05 46 57.125 +00 25 35.72           ~ 3 0
147 [SPA2015] 185 Y*? 05 46 57.967 +00 25 01.88           ~ 1 0
148 2MASS J05465803+0014278 TT* 05 46 58.0376324376 +00 14 27.844115784           M3 10 0
149 2MASS J05465813+0005381 TT* 05 46 58.1440932144 +00 05 38.319048636           M0 12 0
150 2MASS J05465870+0026490 Y*O 05 46 58.701 +00 26 49.03           ~ 2 0
151 2MASS J05465902+0024578 Y*O 05 46 59.03 +00 24 57.9           ~ 4 0
152 [MGM2012] 3382 Y*? 05 47 00.41 +00 22 59.3           ~ 3 0
153 2MASS J05470084+0005120 Y*O 05 47 00.842 +00 05 12.02           ~ 3 0
154 [SPA2015] 126 Y*? 05 47 01.0707181728 +00 25 43.886548344           ~ 1 0
155 2MASS J05470207+0023297 Y*O 05 47 02.074 +00 23 29.73           ~ 3 0
156 2MASS J05470296+0006025 Y*O 05 47 02.9768375472 +00 06 02.496024216           ~ 3 0
157 2MASS J05470331+0023232 Y*O 05 47 03.3139100376 +00 23 23.273392848           M1.8 12 0
158 2MASS J05470374+0023293 Y*O 05 47 03.7464179472 +00 23 29.328261144           ~ 4 0
159 2MASS J05470397+0011143 TT* 05 47 03.9815243712 +00 11 14.267802876           M2 17 0
160 2MASS J05470400+0022103 Y*O 05 47 04.004 +00 22 10.38           ~ 9 0
161 2MASS J05470435+0023198 Y*O 05 47 04.3579793664 +00 23 19.873228740           ~ 3 0
162 2MASS J05470471+0019189 Y*O 05 47 04.7106340032 +00 19 18.962796828           ~ 3 0
163 2MASS J05470530+0023101 Y*O 05 47 05.2966607472 +00 23 10.268888748           M2.1 13 0
164 EM* LkHA 307 TT* 05 47 06.00168 +00 32 08.4804     17.5     K0 22 0
165 2MASS J05470617+0020324 Y*O 05 47 06.1684559496 +00 20 32.504983296           M1 11 0
166 [SPA2015] 86 Y*? 05 47 06.258 +00 24 53.96           ~ 1 0
167 EM* LkHA 309 TT* 05 47 06.9688378728 +00 00 47.643863076     14.7     K4.5 29 0
168 2MASS J05470698+0031559 TT* 05 47 06.9865570776 +00 31 55.962366060           M1 12 0
169 EM* LkHA 308 TT* 05 47 07.2632601168 +00 19 32.170074348   18.0 15.9     M0 21 0
170 2MASS J05470792+0020247 Y*O 05 47 07.9255760064 +00 20 24.706949316           ~ 3 0
171 2MASS J05470870+0016347 Y*O 05 47 08.7113921256 +00 16 34.766020128           M4.5 4 0
172 NGC 2071 RNe 05 47 10 +00 18.0           ~ 645 1
173 2MASS J05471062+0021149 Y*O 05 47 10.62744 +00 21 14.9616           ~ 23 0
174 2MASS J05471071+0032110 Y*O 05 47 10.7188353528 +00 32 11.006110464           M7 3 0
175 2MASS J05471089+0032059 TT* 05 47 10.8913812312 +00 32 05.958204864           M1.5 10 0
176 2MASS J05471245+0022152 Y*O 05 47 12.459 +00 22 15.23           ~ 4 0
177 2MASS J05471291+0022064 Y*O 05 47 12.9168312600 +00 22 06.537517212           M0 13 0
178 [MGM2012] 3283 Y*O 05 47 13.1963172312 +00 10 55.336152576           ~ 3 0
179 EM* LkHA 313 TT* 05 47 13.84752 +00 00 17.0532       14.70   M1 20 0
180 EM* LkHA 314 TT* 05 47 14.1132479736 +00 09 07.305335676   14.90 13.8     Ke 28 0
181 2MASS J05471488+0021187 Y*O 05 47 14.887 +00 21 18.75           ~ 4 0
182 2MASS J05471550+0018462 Y*O 05 47 15.509 +00 18 46.22           ~ 3 0
183 2MASS J05471658-0000563 TT* 05 47 16.5922471848 -00 00 56.415059604           M4 10 0
184 2MASS J05471716+0018246 TT* 05 47 17.1639225216 +00 18 24.549942276     18.5     M1 11 0
185 2MASS J05471918+0019206 Y*O 05 47 19.1870045928 +00 19 20.629085376           ~ 9 0
186 2MASS J05471972+0001218 TT* 05 47 19.7297149200 +00 01 21.797963148           M5 5 0
187 2MASS J05471990+0016131 Y*O 05 47 19.9050423816 +00 16 13.035987912           M5 4 0
188 2MASS J05472079+0019245 Y*O 05 47 20.7903985464 +00 19 24.467315484           ~ 4 0
189 2MASS J05472291+0020577 Y*O 05 47 22.914 +00 20 57.77           ~ 6 0
190 2MASS J05472540+0019398 Y*O 05 47 25.401 +00 19 39.85           ~ 4 0
191 2MASS J05472609+0019277 Y*O 05 47 26.096 +00 19 27.70           ~ 3 0
192 2MASS J05472632+0018483 Y*O 05 47 26.3290358400 +00 18 48.316143096           M2.6 9 0
193 2MASS J05472703+0019265 Y*O 05 47 27.034 +00 19 26.50           ~ 3 0
194 2MASS J05472736+0005152 Y*O 05 47 27.3660880427 +00 05 15.423817926           M3.8 10 0
195 2MASS J05472775+0020357 Y*O 05 47 27.75048 +00 20 35.7540           ~ 10 0
196 2MASS J05473169+0020206 Y*O 05 47 31.691 +00 20 20.63           ~ 5 0
197 2MASS J05473393+0040074 Y*O 05 47 33.932 +00 40 07.43           ~ 3 0
198 [SPA2015] 106 Y*? 05 47 35.166 +00 21 29.12           ~ 1 0
199 [SPA2015] 161 Y*? 05 47 43.4735493720 -00 26 18.110200128           ~ 1 0
200 2MASS J05474531+0000097 Y*O 05 47 45.3311322744 +00 00 09.805918752           ~ 3 0
201 [SPA2015] 174 Y*? 05 47 51.834 +00 15 53.14           ~ 1 0
202 [SPA2015] 162 Y*? 05 48 02.016 +00 15 33.44           ~ 1 0
203 AP J05480399+0003412 LP? 05 48 04.0021806240 +00 03 40.923526284           ~ 7 0
204 UCAC4 449-011994 Y*O 05 48 11.8842993984 -00 21 57.529784664   15.556 14.101 14.511   ~ 6 1
205 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1098 1
206 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
207 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1065 1
208 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
209 NAME Cha II MoC 12 54 -77.2           ~ 337 0
210 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 286 0
211 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
212 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 152 0
213 Lupus 3 SFR 16 09.6 -39 03           ~ 323 0
214 ELAIS N1 reg 16 10 01 +54 30.6           ~ 421 0
215 NAME Upper Sco Association As* 16 12 -23.4           ~ 1369 1
216 Lupus 5 MoC 16 21 -37.5           ~ 63 0
217 Lupus 6 Cld 16 25 -40.3           ~ 51 1
218 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 648 0
219 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1100 2
220 IC 1396 OpC 21 38 58.8 +57 30 50           ~ 496 1
221 NAME Gould Belt PoG ~ ~           ~ 873 1

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