02186+4017 EGG 2 Aa,Ab
02h 18m 36.27s +40° 16' 43.7" P.A. 97.00 sep 0.1 mag 7.90,7.90 Sp F3V dist. 97.47 pc (317.95 l.y.)
Coord 2000 |
02186+4017 |
|
Discov num |
EGG 2 |
|
Comp |
Aa,Ab |
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Coord arcsec 2000 |
02 18 36.27 +40 16 43.7 |
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Date first |
1965 |
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Date last |
2014 |
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Obs |
22 |
|
Pa first |
340 |
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Pa last |
96.8 |
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P.A. Now (θ) |
139.2° |
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Sep first |
0.2 |
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Sep last |
0.082 |
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Sep. Now (ρ) |
0.228" |
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Mag pri |
7.90 |
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Mag sec |
7.90 |
|
delta mag (ΔM) |
0 |
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Spectral class |
F3V (yellow-white) |
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Pri motion ra |
-028 |
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Sec motion ra |
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Pri motion dec |
+004 |
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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.
02186+4017 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
37940 |
02 18 36 +40 16 44 |
EGG 2 Aa,Ab |
2014 |
22 |
97 |
0.1 |
7.90 |
7.90 |
0.00 |
Y |
<=== |
Show |
HD 14189 |
37940 |
02 18 36 +40 16 44 |
STF 245 AB |
2020 |
60 |
293 |
11.3 |
7.26 |
8.03 |
0.77 |
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Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Andromeda |
|
SAO |
37940 |
|
HIP |
10772 |
|
Tycho2 |
2834-01763-1 |
|
Gaia DR2 |
332903778403980544 |
|
HD |
14189 |
|
ADS |
1763 |
|
BD |
BD+39 517 |
|
Distance |
97.47 |
|
Distance ly |
317.95 |
|
ORBITAL ELEMENTS
Period (P) | 29.71y | ± 0.07 |
Periastron (T) | 2013.02y | ± 0.05 |
Semi-major axis (a) | 136m | ± 0.9 |
Eccentricity (e) | 0.813 | ± 0.005 |
Inclination (i) | 7° | ± 6 |
Longitude of periastron (ω) | 164° | ± 2 |
Node (Ω) | 166° | ± 3 |
Notes | n | |
Reference | Hor2015b | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
154.1 |
0.244 |
2001 |
156.3 |
0.240 |
2002 |
158.5 |
0.235 |
2003 |
161.0 |
0.229 |
2004 |
163.5 |
0.220 |
2005 |
166.3 |
0.210 |
2006 |
169.4 |
0.197 |
2007 |
173.0 |
0.183 |
2008 |
177.3 |
0.166 |
2009 |
182.6 |
0.146 |
2010 |
189.9 |
0.122 |
2011 |
201.1 |
0.093 |
2012 |
224.4 |
0.058 |
2013 |
326.1 |
0.025 |
2014 |
73.8 |
0.057 |
2015 |
98.2 |
0.092 |
2016 |
109.8 |
0.120 |
2017 |
117.2 |
0.144 |
2018 |
122.7 |
0.165 |
2019 |
127.0 |
0.182 |
2020 |
130.6 |
0.196 |
2021 |
133.7 |
0.209 |
2022 |
136.6 |
0.219 |
2023 |
139.2 |
0.228 |
2024 |
141.6 |
0.235 |
2025 |
143.9 |
0.240 |
2026 |
146.1 |
0.244 |
2027 |
148.2 |
0.246 |
2028 |
150.4 |
0.246 |
2029 |
152.5 |
0.246 |
2030 |
154.7 |
0.243 |
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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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