72 Pegasi
catalogues and names
| catalogues and names | NSV 14617, 72 Peg, HR 8943, HD 221673, SAO 73341, BD +30 4978, WDS 23340+3120 |
| constellation | Pegasus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 33min 57.2sec | DEC: +31° 19' 31'' | ||
| position (B1900) | RA: 23h 28min 59.4sec | DEC: +30° 46' 24'' | ||
| proper motion (J2000) | RA: 0.052 arcsec/a | DEC: -0.016 arcsec/a | ||
| radial velocity | -24 km/s note: spectroscopic binaries |
|||
| rotational velocity | <19 km/s | |||
| trigonometric parallax | 0.018 arcsec | |||
| galactic coordinates | longitude: 104.09° | latitude: -28.69° | ||
| note (category: dynamical parallaxes): | 0.005". |
magnitude
| visual magnitude | 4.98 (V on UBV Johnson system) |
spectral / color information
| spectral class | K4IIIb |
| B-V-magnitude | 1.38 |
| U-B-magnitude | 1.62 |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | 14617 |
| note (category: variability): | ADS 16836. Uncertain which component varies. |
double/multiple star system information
| separation | 0.5 arcsec |
| mag difference (of double or brightest multiple) | 0.2 |
| note (category: double and multiple data): | 5.6 K4III, 5.7 K5III, 241.20y, a = 0.447". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 33min 57.226sec | DEC: +31° 19' 30.73'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0044 arcsec/a | DEC: -0.024 arcsec/a | source: 25 | |
| radial velocity | -24 km/s | source: 25 | ||
| trigonometric parallax | 0.018 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 104.1° | latitude: -28.69° | ||
magnitude:
| visual | 4.98 (observed) | source: 25 |
| photovisual | 5.2 | source: 2 |
| photographic | 6.3 | source: 16 |
spectral information:
| spectral class | K2 | source: 96 | |
| Morgan-Keenan | K4IIIb | source: 25 | |
| B-magnitude | 6.36 ±0.05 | B-V-magnitude | 1.38 |
| U-magnitude | 7.98 ±0.05 | U-B-magnitude | 1.62 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.5 arcsec |
| magnitude difference between brightest and second brightest component | 0 |
| position angle | 270 ° |
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 (B1950) | RA: 23h 31min 28.032sec | DEC: +31° 2' 57.2'' | ±0.01 arcsec |
| position (J2000) | RA: 23h 33min 57.199sec | DEC: +31° 19' 31.4'' | |
| proper motion B1950 (FK4) | RA: 0.004 arcsec/a | DEC: -0.011 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0041 arcsec/a | DEC: -0.016 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.2 (accuracy: 2 decimals) |
| source of visual magnitude data | Combined magnitude of component stars. |
spectral information:
| spectral class | K2 |
| source of spectral data | Taken from the HD with M stars reclassified by Miss Cannon. |
remarks for duplicity and variability
| Double star - see source catalog for source |
catalogues
| source catalogue | FK3, catalogue number: 887 |
| Durchmusterung | BD+30 4978 |
| Boss General Catalogue | 32772 |
| Henry Draper Catalogue | 221673 Brighter component with a companion <= 0.3 mag fainter. |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 34min | DEC: +31° 20' |
| proper motion (J2000) | RA: 0.056 arcsec/a | DEC: -0.024 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 |
| - | 1878 | often | 128° | 0.4'' | 6 | 6 | K4III | BU 720 |
| 1993 | 270° | 0.5'' |
discoverer information:
| discoverer code | discoverer | reference |
| BU 720 | Burnham, S.W. | - |
notes:
| note | 72 Peg. P = 241yr., a = 0.45", motion direct. Variable? |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 23h 29min | DEC: +30° 47' |
magnitudes, spectral classes, orbital elements:
| author: | P. Baize |
| date of observation: | 1974 |
| magnitude of component A: | 5.7 |
| magnitude of component B: | 5.7 |
| spectral class component B: | K4III |
| spectral class component B: | K4III |
| period [y]: | 241.2 |
| semi-major axis [arcsec]: | 0.447 |
| inclination [deg]: | 35.6 |
| node [deg]: | 123.8 |
| eccentricity: | 0.28 |
| time of periastron passage: | 1857.45 |
| dates of ephemeris: | 1975-2000 |
| grade: | reliable |
| reference: | Astron. Astrophys. Suppl. 26, 177; 1976. |
| other name(s) | BU 720, 72 Peg |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 23h 31min 28sec | DEC: +31° 2' 57'' |
variability informations:
| magnitute at max. brightness | 4.95 |
| magnitute at min. brightness | 4.98 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K3 |
references
| to a study | 620955D (designation: ADS 16836) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |