n Geminorum


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0


catalogues and names n Gem, 18 Gem, HR 2343, HD 45542, SAO 78423, FK5: 1173, WDS 06290+2013Aa
constellation Gemini

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)


position, motion, parallax:

position (J2000) RA: 6h 28min 57,8sec DEC: +20 12' 44''
position (J1900) RA: 6h 23min 1,5sec DEC: +20 16' 32''
proper motion (J2000) RA: -0,007 arcsec/a DEC: -0,014 arcsec/a
radial velocity 39 km/s
note: spectroscopic binaries
rotational velocity 219 km/s (uncertain) (variable)
trigonometric parallax 0,009 arcsec

magnitude

visual magnitude 4,15
(V on UBV Johnson system)

spectral / color information

spectral class B6IIIe
B-V-magnitude -0,13
U-B-magnitude -0,48
R-I-magnitude -0,11
note (category: spectra): Shell star.

double/multiple star system information

number of components of multiple star system 8
separation 0,2 arcsec
mag difference (of double or brightest multiple) 1,7
component ID AA'
note (category: double and multiple data): AA' probably combined light and color. This may be the SB pair, 4.3, 6.0v, sep. 0.2". B, 8.5V A1V at 113", vsini 141k/s, is binary with C, 8.9v, sep. 0.2". Component P, 15.1V at 24" optical. Other components faint at 54" to 92".
note (category: spectroscopic binaries): ADS 5103A, 9.6y. Resolved by speckle interferometry 1983.93, sep. 0.07".

miscellaneous information

note (category: group membership): Hyades group.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 6h 28min 57,781sec DEC: +20 12' 43,56'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0005 arcsec/a DEC: -0,014 arcsec/a source: 25
radial velocity 39 km/s source: 25
trigonometric parallax 0,009 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 192,43 latitude: 4,35
GCI unit vector (J2000) X: -0,118277 Y: 0,930936 Z: 0,345496

magnitude:

visual 4,15 (observed) source: 25
photovisual 4,1 source: 2

spectral information:

spectral class B5 source: 96
Morgan-Keenan B6IIIe source: 25
B-magnitude 4,02 0,05 B-V-magnitude -0,13
U-magnitude 3,54 0,05 U-B-magnitude -0,48

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 112,5 arcsec
magnitude difference between brightest and second brightest component 3,85
position angle 329

component magnitude spectral class catalogue(s)/name(s)
A 4,15 B5 n Geminorum, 18 Gem, HR 2343, HD 45542, SAO 78423
B 8 A0

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 (J1950) RA: 6h 25min 59,627sec DEC: +20 14' 44,06'' 0,004 arcsec
position (J2000) RA: 6h 28min 57,784sec DEC: +20 12' 43,45''
proper motion J1950 (FK4) RA: -0,0004 arcsec/a DEC: -0,017 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0005 arcsec/a DEC: -0,015 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1173
Durchmusterung BD+20 1441
Boss General Catalogue 8394
Henry Draper Catalogue 45542

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 6h 29min DEC: +20 13'
proper motion (J2000) RA: -0,007 arcsec/a DEC: -0,014 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 1920 8 121 0,2'' 4,1 - B5 BTZ 1
1991 310 0,1''
Aa-BC 1876 7 329 112,5'' 4,15 8 B6IIIe STT 77
Aa-P 1890 2 358 22,6'' 4,1 15,1 - BU 1192
1958 360 23,7''
Aa-Q 1890 1 13 53,9'' 4,15 13,9 B6III BU 1192
Aa-R 1890 2 255 56,8'' 4,15 12,6 B6III BU 1192
1924 254 55,6''
Aa-S 1890 1 12 92,1'' - 13 - BU 1192
BC 1890 35 346 0,2'' 8,6 8,9 - BU 1192
1991 354 0,1''

discoverer information:

discoverer code discoverer reference
BTZ 1 Bernewitz, E. (Publ. Berlin Babelsberg Obs. 14, Pt.1; 1962.)
STT 77 Struve, O. -
BU 1192 Burnham, S.W. -

notes:

note Nu Gem. BC: Round 1955 (Van Biesbroeck and Finsen) but uncertain whether measures pertain to BC or Aa. Aa: Probably a spectroscopic binary, now resolved. P = 11.7yr., a = 0.05", motion direct.