06377+1624 OCC 9011 Aa,Ab (Alhena)
06h 37m 42.71s +16° 23' 57.4" P.A. 260.00 sep 0.4 mag 1.90,7.50 Sp A0IV dist. 33.51 pc (109.31 l.y.)
Coord 2000 |
06377+1624 |
|
Discov num |
OCC9011 |
|
Comp |
Aa,Ab |
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Coord arcsec 2000 |
06 37 42.71 +16 23 57.4 |
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Date first |
1991 |
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Date last |
2012 |
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Obs |
2 |
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Pa first |
126 |
|
Pa last |
259.5 |
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P.A. Now (θ) |
259.5° |
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Sep first |
0.1 |
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Sep last |
0.378 |
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Sep. Now (ρ) |
0.378" |
|
Mag pri |
1.90 |
|
Mag sec |
7.50 |
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delta mag (ΔM) |
5.6 |
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Spectral class |
A0IV (white) |
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Pri motion ra |
+014 |
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Sec motion ra |
|
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Pri motion dec |
-055 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
06377+1624 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
Alhena |
95912 |
06 37 43 +16 23 57 |
OCC 9011 Aa,Ab |
2012 |
2 |
260 |
0.4 |
1.90 |
7.50 |
5.60 |
Y |
<=== |
Show |
|
95912 |
06 37 43 +16 23 57 |
BUP 90 AB |
2009 |
5 |
296 |
140.5 |
1.90 |
13.00 |
11.10 |
|
|
Show |
|
95912 |
06 37 43 +16 23 57 |
BUP 90 AC |
2009 |
5 |
335 |
148.1 |
1.90 |
12.30 |
10.40 |
|
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Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Common name |
Alhena |
|
Constellation |
Gemini |
|
SAO |
95912 |
|
HIP |
31681 |
|
Tycho2 |
1329-01746-1 |
|
HD |
47105 |
|
HR |
2421 |
|
GC |
8633 |
|
BD |
BD+16 1223 |
|
Bayer |
Gamma Geminorum |
|
Bayer name |
Gam Gem |
|
Flamsteed |
24 Geminorum |
|
Flamsteed name |
24 Gem |
|
FK5 |
251 |
|
Distance |
33.51 |
|
Distance ly |
109.31 |
|
Bayer greek |
γ Gem |
|
Meaning |
one who shines / forward |
|
ORBITAL ELEMENTS
Period (P) | 12.634y | |
Periastron (T) | 1979.34y | |
Semi-major axis (a) | 0.2732a | |
Eccentricity (e) | 0.89 | |
Inclination (i) | 106.7° | |
Longitude of periastron (ω) | 132.6° | |
Node (Ω) | 243.6° | |
Notes | n | |
Reference | Dru2014 | |
Equinox | | |
Last observation | 2012 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
257.6 |
0.382 |
2001 |
255.7 |
0.371 |
2002 |
253.5 |
0.339 |
2003 |
250.6 |
0.279 |
2004 |
244.8 |
0.161 |
2005 |
9.0 |
0.041 |
2006 |
289.1 |
0.107 |
2007 |
275.3 |
0.186 |
2008 |
269.3 |
0.251 |
2009 |
265.7 |
0.302 |
2010 |
263.0 |
0.341 |
2011 |
260.8 |
0.368 |
2012 |
258.8 |
0.381 |
2013 |
256.9 |
0.380 |
2014 |
254.9 |
0.362 |
2015 |
252.5 |
0.321 |
2016 |
249.1 |
0.245 |
2017 |
237.2 |
0.079 |
2018 |
319.5 |
0.055 |
2019 |
282.2 |
0.137 |
2020 |
272.7 |
0.211 |
2021 |
267.8 |
0.271 |
2022 |
264.6 |
0.318 |
2023 |
262.2 |
0.352 |
2024 |
260.1 |
0.374 |
2025 |
258.1 |
0.383 |
2026 |
256.2 |
0.376 |
2027 |
254.1 |
0.350 |
2028 |
251.5 |
0.299 |
2029 |
247.1 |
0.202 |
2030 |
50.6 |
0.043 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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