HR 8918
| catalogues and names |
| The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) |
| SKY2000 - Master Star Catalog |
| Smithsonian Astrophysical Observatory Star Catalog |
catalogues and names
| catalogues and names | HR 8918, HD 220974, SAO 10737, BD +69 1332 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 27min 16.6sec | DEC: +70° 21' 35'' | ||
| position (B1900) | RA: 23h 23min 2.7sec | DEC: +69° 48' 34'' | ||
| proper motion (J2000) | RA: 0.119 arcsec/a | DEC: -0.006 arcsec/a | ||
| radial velocity | -3 km/s note: spectroscopic binaries, double lined spectra |
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| rotational velocity | 115 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.023 arcsec | |||
| galactic coordinates | longitude: 115.92° | latitude: 8.64° | ||
magnitude
| visual magnitude | 5.6 (V on UBV Johnson system) |
spectral / color information
| spectral class | A6IV |
| B-V-magnitude | 0.19 (uncertain) |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 27min 16.679sec | DEC: +70° 21' 35.47'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0248 arcsec/a | DEC: -0.001 arcsec/a | source: 25 | |
| radial velocity | -3 km/s | source: 25 | ||
| trigonometric parallax | 0.023 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 115.92° | latitude: 8.64° | ||
magnitude:
| visual | 5.6 (observed) | source: 25 |
| photovisual | 5.6 | source: 2 |
| photographic | 5.7 | source: 16 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A6IV | source: 25 | |
| B-magnitude | 5.76 ±0.05 | B-V-magnitude | 0.16 |
| U-magnitude | 5.88 ±0.05 | U-B-magnitude | 0.12 |
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 | |
| 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 25min 8.94sec | DEC: +70° 5' 4.47'' | ±0.019 arcsec |
| position (J2000) | RA: 23h 27min 16.606sec | DEC: +70° 21' 35.2'' | |
| proper motion B1950 (FK4) | RA: 0.0232 arcsec/a | DEC: 0.001 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0236 arcsec/a | DEC: -0.006 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A2 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 32639 |
| Durchmusterung | BD+69 1332 |
| Boss General Catalogue | 32639 |
| Henry Draper Catalogue | 220974 |