p Capricorni


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 p Cap, 10 Cap, HR 7814, HD 194636, SAO 163592, WDS 20273-1813A
constellation Capricornus

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


position, motion, parallax:

position (J2000) RA: 20h 27min 19,2sec DEC: -18 12' 42''
position (J1900) RA: 20h 21min 35,8sec DEC: -18 32' 23''
proper motion (J2000) RA: 0,015 arcsec/a DEC: -0,011 arcsec/a
radial velocity -13 km/s
note: suspected variable radial velocity
rotational velocity 93 km/s (uncertain) (variable)

magnitude

visual magnitude 5,25
(V on UBV Johnson system)

spectral / color information

spectral class B8II-III
B-V-magnitude -0,07
U-B-magnitude -0,41

double/multiple star system information

number of components of multiple star system 3
separation 3,3 arcsec
mag difference (of double or brightest multiple) 3,4
component ID AB
note (category: double and multiple data): AB CPM.

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

position, motion, parallax:

position (J2000) RA: 20h 27min 19,229sec DEC: -18 12' 42,61'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0008 arcsec/a DEC: -0,016 arcsec/a source: 25
radial velocity -13 km/s source: 25
galactic coord. (B1950) longitude: 26,23 latitude: -29,08
GCI unit vector (J2000) X: 0,569417 Y: -0,760321 Z: -0,312531

magnitude:

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

spectral information:

spectral class B8 source: 96
Morgan-Keenan B8II-III source: 25
B-magnitude 5,18 0,05 B-V-magnitude -0,07
U-magnitude 4,77 0,05 U-B-magnitude -0,41

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 0,1 arcsec
position angle 306

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
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: 20h 24min 27,627sec DEC: -18 22' 37,45'' 0,009 arcsec
position (J2000) RA: 20h 27min 19,226sec DEC: -18 12' 42,18''
proper motion J1950 (FK4) RA: 0,0009 arcsec/a DEC: -0,01 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,001 arcsec/a DEC: -0,011 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class B8
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: 28442
Durchmusterung BD-18 5685
Boss General Catalogue 28442
Henry Draper Catalogue 194636

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

position and proper motion:

position (J2000) RA: 20h 27,3min DEC: -18 13'
proper motion (J2000) RA: 0,014 arcsec/a DEC: -0,014 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
Aa 1992 1 306 0,1'' 5,25 - B8II-III CHR 184
Aa-B 1846 51 146 2,8'' 5,2 8,8 - BU 60
1986 - 3,4''
AC 1898 1 44 38,1'' 5,2 14,1 - BU 296

discoverer information:

discoverer code discoverer reference
CHR 184 - -
BU 60 Burnham, S.W. (Mon. Not. R. Astron. Soc. 72, 156; 1911.)
BU 296 Burnham, S.W. -

notes:

note Pi Cap. The suspected radial velocity variation may well be explained by the close pair.