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 |
|
Coord arcsec 2000 |
06 37 42.71 +16 23 57.4 |
|
| Date first |
1991 |
|
Date last |
2012 |
|
Obs |
2 |
|
| Pa first |
126 |
|
Pa last |
259.5 |
|
P.A. Now (θ) |
259.5° |
|
| Sep first |
0.1 |
|
Sep last |
0.378 |
|
Sep. Now (ρ) |
0.378" |
|
| Mag pri |
1.90 |
|
Mag sec |
7.50 |
|
delta mag (ΔM) |
5.6 |
|
Spectral class |
A0IV (white) |
|
| Pri motion ra |
+014 |
|
Sec motion ra |
|
|
| Pri motion dec |
-055 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
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 |
|
|
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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