g Persei
catalogues and names
catalogues and names | g Per, gam Per, 23 Per, HR 915, HD 18925, SAO 23789, BD +52 654, FK5: 108, WDS 03048+5330A |
constellation | Perseus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
position (J2000) | RA: 3h 4min 47.8sec | DEC: +53° 30' 23'' | ||
position (2000.73) | RA: 3h 4min 51sec | DEC: +53° 30' 33'' | ||
position (B1900) | RA: 2h 57min 32.9sec | DEC: +53° 6' 54'' | ||
proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.005 arcsec/a | ||
radial velocity | 3 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
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rotational velocity | =<50 km/s (uncertain) (variable) | |||
trigonometric parallax | 0.016 arcsec | |||
galactic coordinates | longitude: 142.07° | latitude: -4.34° |
magnitude
visual magnitude | 2.93 (V on UBV Johnson system) |
spectral / color information
spectral class | G8III+A2V |
B-V-magnitude | 0.7 |
U-B-magnitude | 0.45 |
R-I-magnitude | |
IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
number of components of multiple star system | 3 |
separation | 57 arcsec |
mag difference (of double or brightest multiple) | 8.6 |
component ID | AB |
note (category: double and multiple data): | SKYLAB observations indicate cool star with hot companion. Components Aa, 14.65y, a = 0.159". Physical nature of B, 11m at 57", uncertain. |
note (category: spectroscopic binaries): | 5350d, K 12.7 or 21.9k/s, V0 +2.5k/s, msin3i 4.87, asini 648. vsini of secondary 50k/s. Resolved by speckle interferometry 1981.67, sep. 0.284", 1983.93, sep. 0.27". |
miscellaneous information
note (category: miscellaneous): | Close to error box of X-ray source 3U0305+53. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 3h 4min 47.791sec | DEC: +53° 30' 23.29'' | ±0.06 arcsec | source: 15 |
position (2000.73) | RA: 3h 4min 51sec | DEC: +53° 30' 33'' | JD: 2451810.11 | |
proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.005 arcsec/a | source: 25 | |
radial velocity | 3 km/s | source: 25 | ||
trigonometric parallax | 0.016 arcsec | ±0.002 arcsec | source: 25 | |
galactic coord. (B1950) | longitude: 142.07° | latitude: -4.34° |
magnitude:
visual | 2.93 (observed) | source: 25 |
photovisual | 3.1 | source: 2 |
spectral information:
spectral class | F5 | source: 96 | |
Morgan-Keenan | G8III+A2V | source: 25 | |
B-magnitude | 3.63 ±0.05 | B-V-magnitude | 0.7 |
U-magnitude | 4.08 ±0.05 | U-B-magnitude | 0.45 |
double/multiple star system information:
separation between brightest and second brightest component | 57 arcsec |
magnitude difference between brightest and second brightest component | 7.7 |
position angle | 326 ° |
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 | |
15 | FK5, FK5 Extension and FK5 Supplement |
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 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: 3h 1min 9.595sec | DEC: +53° 18' 44.29'' | ±0.004 arcsec |
position (2000.73) | RA: 3h 4min 51sec | DEC: +53° 30' 33'' | JD: 2451810.11 |
position (J2000) | RA: 3h 4min 47.788sec | DEC: +53° 30' 23.24'' | |
proper motion B1950 (FK4) | RA: 0 arcsec/a | DEC: -0.002 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0.0001 arcsec/a | DEC: -0.005 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 3.1 (accuracy: 2 decimals) |
source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
spectral class | +++ |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | FK4, catalogue number: 108 |
Durchmusterung | BD+52 654 |
Boss General Catalogue | 3664 |
Henry Draper Catalogue | 18925 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
position (J2000) | RA: 3h 4.8min | DEC: +53° 30' |
proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.005 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 |
Aa | 1939 | 21 | 49° | 0.1'' | 2.93 | - | G8III+A2V | WRH |
1993 | 69° | - | ||||||
Aa-B | 1879 | 4 | 324° | 57.7'' | 3.1 | 10.8 | G8III+A2V | HJ 2170 |
1938 | 326° | 57'' |
discoverer information:
discoverer code | discoverer | reference |
WRH | Wilson, R.H. | |
HJ 2170 | Herschel, J. | - |
notes:
note | Gamma Per. Also a spectroscopic binary. Spectrum composite; G8III+A2V. Now resolved by speckle interferometry. B, at 57", is uncertainly physical. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
position (B1900) | RA: 2h 57.5min | DEC: +53° 7' |
magnitudes, spectral classes, orbital elements:
author: | H.A. McAlister |
magnitude of component A: | 2.9 |
magnitude of component B: | 2.9 |
spectral class component B: | G8III |
spectral class component B: | G8III |
period [y]: | 14.65 |
semi-major axis [arcsec]: | 0.159 |
inclination [deg]: | 88 |
node [deg]: | 242.6 (ascending) |
eccentricity: | 0.72 |
time of periastron passage: | 1947.209 |
grade: | reliable |
reference: | Astron. J. 87, 563; 1982. |
notes | Double-lined spectroscopic binary, with elements P, T, e from the orbit by McLaughlin (1948), now resolved by speckle interferometry. The physical nature of the visual companion B (57", mag. 11) is uncertain. |