y1Piscium


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

  5. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names y1Psc, NSV 00397, 74 Psc, HR 310, HD 6456, SAO 74482, WDS 01057+2128A
constellation Pisces

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


position, motion, parallax:

position (J2000) RA: 1h 5min 40,9sec DEC: +21 28' 24''
position (J1900) RA: 1h 0min 19,1sec DEC: +20 56' 16''
proper motion (J2000) RA: 0,05 arcsec/a DEC: -0,016 arcsec/a
radial velocity -3 km/s
note: variable radial velocity
rotational velocity 246 km/s (uncertain) (variable)
dynamical parallax 0,016 arcsec

magnitude

visual magnitude 5,34
(V on UBV Johnson system)

spectral / color information

spectral class A1Vn
B-V-magnitude -0,03
U-B-magnitude -0,06

variability information

variable star identification 397

double/multiple star system information

number of components of multiple star system 3
separation 29,9 arcsec
mag difference (of double or brightest multiple) 0,3
component ID AB
note (category: double and multiple data): CPM with HR 311. Third component optical.

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

position, motion, parallax:

position (J2000) RA: 1h 5min 40,962sec DEC: +21 28' 23,5'' 0,35 arcsec source: 17
proper motion (J2000) RA: 0,004 arcsec/a DEC: -0,019 arcsec/a source: 25
radial velocity -3 km/s source: 25
galactic coord. (B1950) longitude: 127,35 latitude: -41,28
GCI unit vector (J2000) X: 0,892632 Y: 0,263066 Z: 0,366066

magnitude:

visual 5,34 (observed) source: 25
photovisual 5,6 source: 2
photographic 5,6 source: 16

spectral information:

spectral class A2 source: 96
Morgan-Keenan A1Vn source: 25
B-magnitude 5,31 0,05 B-V-magnitude -0,03
U-magnitude 5,25 0,05 U-B-magnitude -0,06

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 30 arcsec
magnitude difference between brightest and second brightest component 0,22
position angle 159

component magnitude spectral class catalogue(s)/name(s)
A 5,34 A2 y1Piscium, 74 Psc, HR 310, HD 6456, SAO 74482
B 5,56 A0 y1Piscium, 74 Psc, HR 311, HD 6457, SAO 74483

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
17 ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991
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
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 (J1950) RA: 1h 2min 59,772sec DEC: +21 12' 21,62'' 0,02 arcsec
position (J2000) RA: 1h 5min 40,941sec DEC: +21 28' 23,74''
proper motion J1950 (FK4) RA: 0,0036 arcsec/a DEC: -0,011 arcsec/a 0,004 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0036 arcsec/a DEC: -0,016 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A2
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: 1309
Durchmusterung BD+20 156
Boss General Catalogue 1309
Henry Draper Catalogue 6456

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

position and proper motion:

position (J2000) RA: 1h 5,7min DEC: +21 28'
proper motion (J2000) RA: 0,055 arcsec/a DEC: -0,019 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 69 159 30'' 5,34 5,56 B9.5V A0V STF 88
AC 1907 4 122 94,2'' 5,6 11,2 A2 STF 88
1988 123 91,3''
BC 1881 3 108 74,8'' 5,8 11,6 A0 STF 88
1914 - 73,4''

discoverer information:

discoverer code discoverer reference
STF 88 Struve, F.G.W. -

notes:

note Psi (1) Psc. Proper motion of B +059 -017.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 1h 2min 59,8sec DEC: +21 12' 22''

variability informations:

magnitute at max. brightness 5,33
magnitute at min. brightness
photometric system visual, photovisual or Johnson's V

spectral information

spectral class A1

references

to a study 731201D (designation: HD 6456)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).