2 Ursae Majoris
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 | 2 UMa, HR 3354, HD 72037, SAO 14590, BD +65 638 |
constellation | Ursa Major |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
position (J2000) | RA: 8h 34min 36.2sec | DEC: +65° 8' 42'' | ||
position (B1900) | RA: 8h 25min 39.1sec | DEC: +65° 29' 10'' | ||
proper motion (J2000) | RA: -0.049 arcsec/a | DEC: -0.063 arcsec/a | ||
radial velocity | -16 km/s | |||
rotational velocity | 17 km/s (uncertain) (variable) | |||
trigonometric parallax | 0.017 arcsec | |||
galactic coordinates | longitude: 150.52° | latitude: 35.21° |
magnitude
visual magnitude | 5.47 (V on UBV Johnson system) |
spectral / color information
spectral class | A2m |
B-V-magnitude | 0.18 |
U-B-magnitude | 0.1 |
R-I-magnitude |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 8h 34min 36.123sec | DEC: +65° 8' 42.25'' | ±0.35 arcsec | source: 17 |
proper motion (J2000) | RA: -0.0085 arcsec/a | DEC: -0.065 arcsec/a | source: 25 | |
radial velocity | -16 km/s | source: 25 | ||
trigonometric parallax | 0.017 arcsec | ±0.002 arcsec | source: 25 | |
galactic coord. (B1950) | longitude: 150.52° | latitude: 35.21° |
magnitude:
visual | 5.47 (observed) | source: 25 |
photovisual | 5.4 | source: 2 |
photographic | 5.4 | source: 16 |
spectral information:
spectral class | A0 | source: 96 | |
Morgan-Keenan | A2m | source: 25 | |
B-magnitude | 5.65 ±0.05 | B-V-magnitude | 0.18 |
U-magnitude | 5.75 ±0.05 | U-B-magnitude | 0.1 |
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: 8h 30min 8.936sec | DEC: +65° 19' 3.83'' | ±0.017 arcsec |
position (J2000) | RA: 8h 34min 36.235sec | DEC: +65° 8' 42.43'' | |
proper motion B1950 (FK4) | RA: -0.0077 arcsec/a | DEC: -0.066 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0.0078 arcsec/a | DEC: -0.063 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 5.4 (accuracy: 2 decimals) |
source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
spectral class | A0 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | GC, catalogue number: 11700 |
Durchmusterung | BD+65 638 |
Boss General Catalogue | 11700 |
Henry Draper Catalogue | 72037 |