V0816 Cassiopeiae
catalogues and names
| catalogues and names | V0816 Cas, HR 8989, HD 222670, SAO 20791, BD +63 2038, WDS 23423+6431 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 42min 20.8sec | DEC: +64° 30' 56'' | ||
| position (B1900) | RA: 23h 37min 37.5sec | DEC: +63° 57' 39'' | ||
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: -0.002 arcsec/a | ||
| radial velocity | -3 km/s | |||
| galactic coordinates | longitude: 115.58° | latitude: 2.63° | ||
magnitude
| visual magnitude | 6.56 (V on UBV Johnson system) |
spectral / color information
| spectral class | M2III |
| B-V-magnitude | 1.88 |
| U-B-magnitude | 2.12 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| separation | 2.6 arcsec |
| mag difference (of double or brightest multiple) | 4.4 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 42min 20.963sec | DEC: +64° 30' 55.05'' | ±0.35 arcsec | source: 34 |
| proper motion (J2000) | RA: 0.0024 arcsec/a | DEC: -0.012 arcsec/a | source: 25 | |
| radial velocity | -3 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 115.59° | latitude: 2.63° | ||
magnitude:
| visual | 6.56 (observed) | source: 25 |
| photovisual | 6.9 | source: 2 |
| photographic | 8.2 | source: 16 |
spectral information:
| spectral class | M0 | source: 96 | |
| Morgan-Keenan | M2III | source: 25 | |
| B-magnitude | 8.44 ±0.05 | B-V-magnitude | 1.88 |
| U-magnitude | 10.56 ±0.05 | U-B-magnitude | 2.12 |
double/multiple star system information:
| separation between brightest and second brightest component | 2.7 arcsec |
| magnitude difference between brightest and second brightest component | 4.2 |
| position angle | 276 ° |
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 | |
| 34 | IRS Catalog |
| Corbin, T.E., 1991, U.S. Naval Observatory, International Reference Stars Catalog | |
| 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 39min 58.451sec | DEC: +64° 14' 17.39'' | ±0.037 arcsec |
| position (J2000) | RA: 23h 42min 20.812sec | DEC: +64° 30' 55.81'' | |
| proper motion B1950 (FK4) | RA: 0.0003 arcsec/a | DEC: 0.004 arcsec/a | ±0.007 arcsec/a in RA ±0.006 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0004 arcsec/a | DEC: -0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | M0 |
| 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: 32927 |
| Durchmusterung | BD+63 2038 |
| Boss General Catalogue | 32927 |
| Henry Draper Catalogue | 222670 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 23h 42.3min | DEC: +64° 31' |
| proper motion (J2000) | RA: 0.015 arcsec/a | DEC: -0.006 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 |
| - | 1880 | 9 | 276° | 2.7'' | 6.6 | 10.8 | M2III: | BU 993 |
discoverer information:
| discoverer code | discoverer | reference |
| BU 993 | Burnham, S.W. | - |