15282+0251 A 2175 (HD 137844)
15h 28m 12.94s +02° 51' 21.6" P.A. 223.00 sep 0.2 mag 8.78,9.09 Sp A5 dist. 250.63 pc (817.56 l.y.)
Coord 2000 |
15282+0251 |
|
Discov num |
A 2175 |
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Comp |
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Coord arcsec 2000 |
15 28 12.94 +02 51 21.6 |
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Date first |
1910 |
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Date last |
2021 |
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Obs |
51 |
|
Pa first |
349 |
|
Pa last |
222.8 |
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P.A. Now (θ) |
222.8° |
|
Sep first |
0.2 |
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Sep last |
0.198 |
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Sep. Now (ρ) |
0.198" |
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Mag pri |
8.78 |
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Mag sec |
9.09 |
|
delta mag (ΔM) |
0.31 |
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Spectral class |
A5 (white) |
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Pri motion ra |
-016 |
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Sec motion ra |
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Pri motion dec |
-016 |
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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.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 137844 |
|
Constellation |
Serpens |
|
SAO |
121015 |
|
HIP |
75724 |
|
Tycho2 |
0341-00121-1 |
|
Gaia DR2 |
4421301323766535168 |
|
HD |
137844 |
|
ADS |
9654 |
|
BD |
BD+03 3034 |
|
Distance |
250.63 |
|
Distance ly |
817.56 |
|
ORBITAL ELEMENTS
Period (P) | 218.14y | |
Periastron (T) | 1495.5y | |
Semi-major axis (a) | 0.263a | |
Eccentricity (e) | 0.5 | |
Inclination (i) | 65.5° | |
Longitude of periastron (ω) | 254.4° | |
Node (Ω) | 177.6° | |
Notes | n | |
Reference | USN2006b | |
Equinox | 2000 | |
Last observation | 1998 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
201.2 |
0.266 |
2001 |
201.8 |
0.264 |
2002 |
202.4 |
0.263 |
2003 |
203.0 |
0.262 |
2004 |
203.6 |
0.260 |
2005 |
204.2 |
0.259 |
2006 |
204.8 |
0.258 |
2007 |
205.4 |
0.256 |
2008 |
206.0 |
0.255 |
2009 |
206.7 |
0.253 |
2010 |
207.3 |
0.251 |
2011 |
208.0 |
0.250 |
2012 |
208.6 |
0.248 |
2013 |
209.3 |
0.246 |
2014 |
210.0 |
0.244 |
2015 |
210.7 |
0.242 |
2016 |
211.4 |
0.241 |
2017 |
212.1 |
0.239 |
2018 |
212.8 |
0.237 |
2019 |
213.6 |
0.235 |
2020 |
214.3 |
0.233 |
2021 |
215.1 |
0.231 |
2022 |
215.8 |
0.229 |
2023 |
216.6 |
0.227 |
2024 |
217.4 |
0.225 |
2025 |
218.3 |
0.223 |
2026 |
219.1 |
0.221 |
2027 |
219.9 |
0.218 |
2028 |
220.8 |
0.216 |
2029 |
221.7 |
0.214 |
2030 |
222.6 |
0.212 |
2031 |
223.5 |
0.210 |
2032 |
224.5 |
0.208 |
2033 |
225.4 |
0.206 |
2034 |
226.4 |
0.204 |
2035 |
227.4 |
0.202 |
2036 |
228.4 |
0.200 |
2037 |
229.4 |
0.198 |
2038 |
230.5 |
0.196 |
2039 |
231.6 |
0.194 |
2040 |
232.7 |
0.192 |
2041 |
233.8 |
0.190 |
2042 |
235.0 |
0.188 |
2043 |
236.1 |
0.186 |
2044 |
237.3 |
0.184 |
2045 |
238.6 |
0.182 |
2046 |
239.8 |
0.180 |
2047 |
241.1 |
0.179 |
2048 |
242.4 |
0.177 |
2049 |
243.7 |
0.175 |
2050 |
245.1 |
0.174 |
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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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