g2Andromedae
catalogues and names
| catalogues and names | g2And, 57 And, HR 604, HD 12534, SAO 37735, BD +41 395 BC, WDS 02039+4220BC |
| constellation | Andromeda |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 2h 3min 54,7sec | DEC: +42° 19' 51'' | ||
| position (2001,18) | RA: 2h 3min 59sec | DEC: +42° 20' 11'' | ||
| position (B1900) | RA: 1h 57min 46,3sec | DEC: +41° 51' 4'' | ||
| proper motion (J2000) | RA: 0,037 arcsec/a | DEC: -0,055 arcsec/a | ||
| radial velocity | -14 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
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| rotational velocity | 70 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0,013 arcsec | |||
| galactic coordinates | longitude: 136,97° | latitude: -18,56° | ||
| note (category: dynamical parallaxes): | 0.010". |
magnitude
| visual magnitude | 4,84 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8V+A0V |
| B-V-magnitude | 0,03 |
| U-B-magnitude | -0,12 |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 9,6 arcsec |
| mag difference (of double or brightest multiple) | 2,8 |
| component ID | AxBC |
| note (category: double and multiple data): | BC 5.5 B8V, 6.3 A0V, 61.1y, a = 0.296". ADS 1630BC CPM with HR 603. Component D, 15v at 28". Possibly also CPM with BD+41d408 at 53'. |
| note (category: spectroscopic binaries): | ADS 1630B, 2.67d, K 141k/s, V0 +2.5k/s, msin3i 1.76, asini 4.95; vsini of both components 70k/s. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 3min 54,731sec | DEC: +42° 19' 51,12'' | ±1,24 arcsec | source: 29 |
| position (2001,18) | RA: 2h 3min 59sec | DEC: +42° 20' 11'' | JD: 2451974,80 | |
| proper motion (J2000) | RA: 0,0034 arcsec/a | DEC: -0,055 arcsec/a | source: 25 | |
| radial velocity | -14 km/s | source: 25 | ||
| trigonometric parallax | 0,013 arcsec | ±0,001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 136,97° | latitude: -18,56° | ||
magnitude:
| visual | 4,84 (observed) | source: 25 |
| photovisual | 5,1 | source: 2 |
| photographic | 5,1 | source: 2 |
spectral information:
| spectral class | A0 | source: 29 | |
| Morgan-Keenan | B8V+A0V | source: 25 | |
| B-magnitude | 4,87 ±0,05 | B-V-magnitude | 0,03 |
| U-magnitude | 4,75 ±0,05 | U-B-magnitude | -0,12 |
double/multiple star system information:
| separation between brightest and second brightest component | 9,6 arcsec |
| magnitude difference between brightest and second brightest component | 2,58 |
| position angle | 63 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 2,26 | K0 | Alamak, g1Andromedae, 57 And, HR 603, HD 12533, SAO 37734 |
| B | 4,84 | A0 | g2Andromedae, 57 And, HR 604, HD 12534, SAO 37735 |
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 | |
| 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 | |
| 29 | SAOJ2000 |
| SAO on FK5 at J2000, 1989 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (B1950) | RA: 2h 0min 49,967sec | DEC: +42° 5' 31,35'' | ±0,019 arcsec |
| position (2001,18) | RA: 2h 3min 59sec | DEC: +42° 20' 14'' | JD: 2451974,80 |
| position (J2000) | RA: 2h 3min 54,731sec | DEC: +42° 19' 51,12'' | |
| proper motion B1950 (FK4) | RA: 0,0033 arcsec/a | DEC: -0,051 arcsec/a | ±0,003 arcsec/a in RA ±0,003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0034 arcsec/a | DEC: -0,055 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,1 (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. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 2479 |
| Durchmusterung | BD+41 395BC |
| Boss General Catalogue | 2479 |
| Henry Draper Catalogue | 12534 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 3,9min | DEC: +42° 20' |
| proper motion (J2000) | RA: 0,045 arcsec/a | DEC: -0,052 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 |
| A-BC | 1830 | often | 63° | 10,3'' | 2,26 | 4,84 | K3IIb | STF 205 |
| 1987 | - | 9,6'' | ||||||
| AD | 1898 | 1 | 245° | 27,9'' | - | 15 | K3IIb | BAR 22 |
| BC | 1842 | often | ° | '' | 5,1 | 6,3 | B8V+A0V | STT 38 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 205 | Struve, F.G.W. | - |
| BAR 22 | Barnard, E.E. | - |
| STT 38 | Struve, O. | - |
notes:
| note | H III 5, SHJ 26. Gamma And. BC: P = 61yr., a = -.30", motion retrograde. B is a spectroscopic binary. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 1h 57,8min | DEC: +41° 51' |
magnitudes, spectral classes, orbital elements:
| author: | P. Muller |
| date of observation: | 1955 |
| magnitude of component A: | 5,3 |
| magnitude of component B: | 5,3 |
| spectral class component B: | B8V |
| spectral class component B: | B8V |
| period [y]: | 61,1 |
| semi-major axis [arcsec]: | 0,296 |
| inclination [deg]: | 111,1 |
| node [deg]: | 104,15 |
| equinox of node: | 1950 |
| eccentricity: | 0,93 |
| time of periastron passage: | 1952,1 |
| dates of ephemeris: | 1950-1970 |
| grade: | good |
| reference: | J. Observateurs 40, 52; 1957. |
| notes | A quadruple system. Star A (mag. 2.3, K3II) forms with BC the pair STF 205, separation 10". Star B is a spectroscopic binary, P = 2.67 d (Maestre and Wright, Astrophys. J. 131, 119; 1960). |