catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

catalogues and names

catalogues and names	w Eri, 61 Eri, HR 1560, HD 31109, SAO 131568, BD -5 1068, FK5: 2366
constellation	Eridanus

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

position, motion, parallax:

position (J2000)	RA: 4h 52min 53.7sec	DEC: -5° 27' 10''
position (B1900)	RA: 4h 47min 58.8sec	DEC: -5° 37' 11''
proper motion (J2000)	RA: -0.023 arcsec/a	DEC: 0.021 arcsec/a
radial velocity	-6 km/s note: spectroscopic binaries note: orbital data avaible
rotational velocity	153 km/s (uncertain) (variable)
trigonometric parallax	0.013 arcsec
galactic coordinates	longitude: 203.75°	latitude: -28.78°

magnitude

visual magnitude

4.39 (V on UBV Johnson system)

spectral / color information

spectral class	F4III+A6III
B-V-magnitude	0.25
U-B-magnitude	0.16
R-I-magnitude

double/multiple star system information

note (category: spectroscopic binaries):

3057d, K 18.1k/s, V0 -8.3k/s, asini 676. Massive invisible component may be a black hole. Unresolved by speckle interferometry 1980.02.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000)	RA: 4h 52min 53.684sec	DEC: -5° 27' 9.63''	±0.19 arcsec	source: 16
proper motion (J2000)	RA: -0.0009 arcsec/a	DEC: 0.029 arcsec/a		source: 25
radial velocity	-6 km/s			source: 25
trigonometric parallax	0.013 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 203.75°	latitude: -28.78°

magnitude:

visual	4.39 (observed)	source: 25
photovisual	4.5	source: 2
photographic	4.7	source: 2

spectral information:

spectral class	F0		source: 96
Morgan-Keenan	F4III+A6III		source: 25
B-magnitude	4.64 ±0.05	B-V-magnitude	0.25
U-magnitude	4.8 ±0.05	U-B-magnitude	0.16

sources:

2	HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
96	SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 4h 50min 26.131sec	DEC: -5° 32' 5.45''	±0.015 arcsec
position (J2000)	RA: 4h 52min 53.672sec	DEC: -5° 27' 9.9''
proper motion B1950 (FK4)	RA: -0.0016 arcsec/a	DEC: 0.022 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0012 arcsec/a	DEC: 0.021 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	F0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 5954
Durchmusterung	BD-05 1068
Boss General Catalogue	5954
Henry Draper Catalogue	31109