a Piscium


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0


catalogues and names a Psc, alf Psc, 113 Psc, HR 595, HD 12446, SAO 110291, WDS 02020+0246B
constellation Pisces

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


position, motion, parallax:

position (J2000) RA: 2h 2min 2,8sec DEC: +2 45' 49''
position (J1900) RA: 1h 56min 52,3sec DEC: +2 16' 51''
proper motion (J2000) RA: 0,033 arcsec/a DEC: -0,005 arcsec/a
radial velocity 9 km/s
note: spectroscopic binaries
rotational velocity 24 km/s (uncertain) (variable)
trigonometric parallax 0,005 arcsec
note (category: dynamical parallaxes): 0.017".

magnitude

visual magnitude 5,23
(original HR magnitude)

spectral / color information

spectral class A3m

variability information

note (category: variability): Alpha CV?

double/multiple star system information

separation 2 arcsec
mag difference (of double or brightest multiple) 1
note (category: double and multiple data): Binary with HR 596, q.v.

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

position, motion, parallax:

position (J2000) RA: 2h 2min 2,83sec DEC: +2 45' 49,3'' 0,76 arcsec source: 18
proper motion (J2000) RA: 0,0023 arcsec/a DEC: 0,002 arcsec/a source: 25
radial velocity 9 km/s source: 25
trigonometric parallax 0,005 - source: 25
galactic coord. (B1950) longitude: 155,36 latitude: -55,6
GCI unit vector (J2000) X: 0,860523 Y: 0,507125 Z: 0,048217

magnitude:

visual 5,21 (observed) source: 25
photovisual 5,2 source: 2
photographic 4 source: 16

spectral information:

spectral class Ap source: 28
Morgan-Keenan A3m source: 25
B-magnitude 5,23 0,01 B-V-magnitude 0,018
U-magnitude 5,14 0,012 U-B-magnitude -0,88

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 1,9 arcsec
magnitude difference between brightest and second brightest component 0,9
position angle 278

component magnitude spectral class catalogue(s)/name(s)
A 4,18 A2 Alrisha, a Piscium, 113 Psc, HR 596, HD 12447, SAO 110291
B 5,21 Ap a Piscium, 113 Psc, HR 595, HD 12446, SAO 110291

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
18 Hipparcos Input Catalog Version 2 Annex
Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 1993
19 WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994

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

position and proper motion:

position (J1950) RA: 1h 59min 27,392sec DEC: +2 31' 23,04'' 0,011 arcsec
position (J2000) RA: 2h 2min 2,81sec DEC: +2 45' 49,12''
proper motion J1950 (FK4) RA: 0,002 arcsec/a DEC: 0 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0022 arcsec/a DEC: -0,005 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A2p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 2452
Durchmusterung BD+02 317
Boss General Catalogue 2452
Henry Draper Catalogue 12446
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 2h 2min DEC: +2 46'
proper motion (J2000) RA: 0,033 arcsec/a DEC: 0,001 arcsec/a

double/multiple star system information:

component year number of measures position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) discoverer code
AB 1821 often 337 3,5'' 4,3 5,2 A0p A3m STF 202
1991 278 1,9''
AC 1856 1 62 406,1'' - - - PWL 1
AD 1856 1 336 457,8'' - - - PWL 1

discoverer information:

discoverer code discoverer reference
STF 202 Struve, F.G.W. -
PWL 1 Powell, E.B. -

notes:

note Alpha Psc. Both components are variables of the Alpha CVn type. Proper motion of B +033 -030. A premature orbit has been computed. A may be a spectroscopic pair.