06149+2230 BU 1008 (Propus)
06h 14m 52.69s +22° 30' 24.6" P.A. 258.00 sep 1.8 mag 3.52,6.15 Sp M2III dist. 117.92 pc (384.66 l.y.)
Coord 2000 |
06149+2230 |
|
Discov num |
BU 1008 |
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Comp |
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Coord arcsec 2000 |
06 14 52.69 +22 30 24.6 |
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Date first |
1881 |
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Date last |
2020 |
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Obs |
112 |
|
Pa first |
300 |
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Pa last |
257.9 |
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P.A. Now (θ) |
257.9° |
|
Sep first |
1.1 |
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Sep last |
1.8 |
|
Sep. Now (ρ) |
1.8" |
|
Mag pri |
3.52 |
|
Mag sec |
6.15 |
|
delta mag (ΔM) |
2.63 |
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Spectral class |
M2III (red) |
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Pri motion ra |
-060 |
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Sec motion ra |
|
|
Pri motion dec |
-008 |
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Sec motion dec |
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Notes |
N
C
(See Notes, Has orbit and linear solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Common name |
Propus |
|
Constellation |
Gemini |
|
SAO |
78135 |
|
HIP |
29655 |
|
Tycho2 |
1877-01716-1 |
|
Gaia DR2 |
3377072212925223424 |
|
HD |
42995 |
|
HR |
2216 |
|
GC |
7969 |
|
ADS |
4841 |
|
BD |
BD+22 1241 |
|
Bayer |
Eta Geminorum |
|
Bayer name |
Eta Gem |
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Flamsteed |
7 Geminorum |
|
Flamsteed name |
7 Gem |
|
Distance |
117.92 |
|
Distance ly |
384.66 |
|
Bayer greek |
η Gem |
|
Other names |
PRAEPES, TEJAT PRIOR |
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ORBITAL ELEMENTS
Period (P) | 1031.1632y | ± 474.7674 |
Periastron (T) | 2078.1316y | ± 134.4663 |
Semi-major axis (a) | 5.10959a | ± 3.20503 |
Eccentricity (e) | 0.84952 | ± 0.13765 |
Inclination (i) | 96.646° | ± 13.63 |
Longitude of periastron (ω) | 253.622° | ± 30.445 |
Node (Ω) | 65.006° | ± 7.543 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2012 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
258.9 |
1.708 |
2001 |
258.7 |
1.712 |
2002 |
258.5 |
1.716 |
2003 |
258.4 |
1.720 |
2004 |
258.2 |
1.724 |
2005 |
258.0 |
1.727 |
2006 |
257.8 |
1.731 |
2007 |
257.6 |
1.734 |
2008 |
257.4 |
1.737 |
2009 |
257.2 |
1.740 |
2010 |
257.1 |
1.743 |
2011 |
256.9 |
1.745 |
2012 |
256.7 |
1.748 |
2013 |
256.5 |
1.750 |
2014 |
256.3 |
1.752 |
2015 |
256.2 |
1.754 |
2016 |
256.0 |
1.756 |
2017 |
255.8 |
1.757 |
2018 |
255.6 |
1.758 |
2019 |
255.4 |
1.759 |
2020 |
255.2 |
1.760 |
2021 |
255.1 |
1.760 |
2022 |
254.9 |
1.761 |
2023 |
254.7 |
1.761 |
2024 |
254.5 |
1.760 |
2025 |
254.4 |
1.760 |
2026 |
254.2 |
1.759 |
2027 |
254.0 |
1.758 |
2028 |
253.8 |
1.756 |
2029 |
253.6 |
1.754 |
2030 |
253.5 |
1.752 |
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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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