p Capricorni
catalogues and names
| catalogues and names | p Cap, 10 Cap, HR 7814, HD 194636, SAO 163592, BD -18 5685, 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 (2001,18) | RA: 20h 27min 23sec | DEC: -18° 12' 28'' | ||
| position (B1900) | 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 |
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| rotational velocity | 93 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 26,22° | latitude: -29,08° | ||
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 |
| position (2001,18) | RA: 20h 27min 23sec | DEC: -18° 12' 29'' | JD: 2451977,78 | |
| 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° | ||
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:
| 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 (B1950) | RA: 20h 24min 27,627sec | DEC: -18° 22' 37,45'' | ±0,009 arcsec |
| position (2001,18) | RA: 20h 27min 24sec | DEC: -18° 12' 27'' | JD: 2451977,78 |
| position (J2000) | RA: 20h 27min 19,226sec | DEC: -18° 12' 42,18'' | |
| proper motion B1950 (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. |