78 Pegasi
catalogues and names
| catalogues and names | 78 Peg, HR 8997, HD 222842, SAO 91457, BD +28 4627, WDS 23440+2922 |
| constellation | Pegasus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 43min 59.5sec | DEC: +29° 21' 42'' | ||
| position (B1900) | RA: 23h 38min 57.5sec | DEC: +28° 48' 27'' | ||
| proper motion (J2000) | RA: 0.071 arcsec/a | DEC: -0.037 arcsec/a | ||
| radial velocity | -7 km/s note: spectroscopic binaries |
|||
| rotational velocity | <19 km/s | |||
| trigonometric parallax | 0.018 arcsec | |||
| galactic coordinates | longitude: 105.73° | latitude: -31.25° | ||
| note (category: dynamical parallaxes): | 0.010". |
magnitude
| visual magnitude | 4.93 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0III |
| B-V-magnitude | 0.95 |
| U-B-magnitude | 0.63 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| separation | 0.9 arcsec |
| mag difference (of double or brightest multiple) | 3.1 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 43min 59.49sec | DEC: +29° 21' 41.4'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0057 arcsec/a | DEC: -0.039 arcsec/a | source: 25 | |
| radial velocity | -7 km/s | source: 25 | ||
| trigonometric parallax | 0.018 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 105.74° | latitude: -31.25° | ||
magnitude:
| visual | 4.93 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 6 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K0III | source: 25 | |
| B-magnitude | 5.88 ±0.05 | B-V-magnitude | 0.95 |
| U-magnitude | 6.51 ±0.05 | U-B-magnitude | 0.63 |
double/multiple star system information:
| separation between brightest and second brightest component | 1 arcsec |
| magnitude difference between brightest and second brightest component | 2.8 |
| position angle | 250 ° |
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 41min 28.241sec | DEC: +29° 5' 4.12'' | ±0.021 arcsec |
| position (J2000) | RA: 23h 43min 59.465sec | DEC: +29° 21' 41.5'' | |
| proper motion B1950 (FK4) | RA: 0.0054 arcsec/a | DEC: -0.032 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0055 arcsec/a | DEC: -0.037 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K0 |
| 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: 32954 |
| Durchmusterung | BD+28 4627 |
| Boss General Catalogue | 32954 |
| Henry Draper Catalogue | 222842 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 44min | DEC: +29° 22' |
| proper motion (J2000) | RA: 0.074 arcsec/a | DEC: -0.039 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 |
| - | 1876 | 78 | 192° | 1.4'' | 5 | 7.8 | G8III | AGC 14 |
| 1994 | 250° | 1'' |
discoverer information:
| discoverer code | discoverer | reference |
| AGC 14 | - | - |
notes:
| note | 78 Peg. |