* eps Eri

Basic data :
* eps Eri -- BY Dra Variable Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types: * (2013A&A,*,...), X (2015A&A,1AXG,...), PM* (Ci,LFT,...), UV (2EUVE,EUVE,...), ** (**,CCDM,...), IR (IRAS,IRC,...), BY* (2017ARep), Ro* (1996ApJ), V* (V*), NIR (2MASS) Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) : 03 32 55.8444911587 -09 27 29.739493865 (Optical) [ 0.1214 0.0930 90 ] A 2020yCat.1350....0G Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) : 03 30 34.3594266810 -09 37 34.811408582 [ 0.1214 0.0930 90 ] Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) : 195.8446406895699 -48.0512999525119 [ 0.1214 0.0930 90 ] Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode" pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr) pm-dec : mu-dec (expressed in the ICRS system in mas/yr) [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the proper motion reference Proper motions mas/yr : -974.758 20.876 [0.160 0.120 90] A 2020yCat.1350....0G Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode" value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity) [error] : error of the corresponding value displayed before (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown) quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the value's origin Radial velocity / Redshift / cz : V(km/s) 16.376 [0.0001] / z(spectroscopic) 0.000055 [0.000000] / cz 16.38 [0.00]    (Opt) A 2018A&A...616A...7S Syntax of parallax is : 'value quality [error] bibcode' value : parallax value quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) [error] : mean error bibcode : bibcode of the parallax reference Parallaxes (mas): 310.5773 [0.1355] A 2020yCat.1350....0G Spectral type is made of 3 parts: %coding is composed of 4 parts : the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities; a quality letter: A=best quality→E=worst quality, {� } =unknown quality % a quality letter: A=best quality -> E=worst quality, {� } =unknown quality bibcode : bibcode of the spectral type reference Spectral type: K2V B 1989ApJS...71..245K Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode" filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z (System) : may be AB (default is Vega) flux-value : value of flux or magnitude [error] : error value quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality) MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4]) bibcode : bibcode of the flux reference Fluxes (9) : U 5.19 [~] C 2002yCat.2237....0D B 4.61 [~] C 2002yCat.2237....0D V 3.73 [~] C 2002yCat.2237....0D R 3.00 [~] C 2002yCat.2237....0D G 3.465752 [0.003075] C 2020yCat.1350....0G I 2.54 [~] C 2002yCat.2237....0D J 2.23 [~] C 2002yCat.2237....0D H 1.75 [~] C 2002yCat.2237....0D K 1.67 [~] C 2002yCat.2237....0D	SIMBAD within arcmin ', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
Some important notes on this object about identifications and objects associations. notes: Two suspected planets, * 18 Eri b by Campbell et al.(1988ApJ...331..902C) and * 18 Eri c by Quillen and Thorndike (2002ApJ...578L.149Q). See eps Eridani in the Extrasolar Planets Encyclopaedia.

* eps Eri	GJ 144.0	PLX 742	SPOCS 171
* 18 Eri	GJ 144	PLX 742.00	TD1 2301
** BLA 2	HD 22049	PMC 90-93 91	TIC 118572803
** MBA 1A	HIC 16537	PM 03306-0938	TYC 5296-1533-1
1AXG J033256-0926	HIP 16537	PPM 185905	UBV 3410
BD-09 697	HR 1084	RAFGL 497	UBV M 9580
CCDM J03329-0927A	IRAS 03305-0937	RAVE J033255.8-092730	uvby98 100022049
Ci 20 241	IRC -10048	RBS 439	V* eps Eri
1E 0330.5-0937	JP11 792	2RE J033253-092646	WDS J03329-0927A
2E 788	LFT 291	2RE J0332-092	WDS J03329-0927Aa,Ab
2E 0330.5-0937	LHS 1557	RE J0332-092	WEB 3160
2EUVE J0332-09.4	LPM 158	RE J033255-092717	YZ 0 4513
EUVE J0332-09.4	LTT 1675	ROT 531	YZ 99 836
FK5 127	2MASS J03325591-0927298	RX J0332.9-0927	Zkh 51
GC 4244	N30 726	1RXS J033256.4-092727	[FS2003] 0134
GCRV 1962	NAME Ran	SACS 76	Gaia DR3 5164707970261890560
GEN# +1.00022049	NLTT 11207	SAO 130564	Gaia DR2 5164707970261630080
GES J03325495-0927294	8pc 310.75	SKY# 5366

References (1885 between 1850 and 2023) (Total 1885) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : * eps Eri

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