01166+1831 HDS 169 (HD 7640)
01h 16m 36.45s +18° 31' 21.6" P.A. 219.00 sep 0.6 mag 8.61,12.20 Sp G5 dist. 63.86 pc (208.31 l.y.)
| Coord 2000 |
01166+1831 |
|
Discov num |
HDS 169 |
|
Comp |
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Coord arcsec 2000 |
01 16 36.45 +18 31 21.6 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
15 |
|
| Pa first |
264 |
|
Pa last |
219.1 |
|
P.A. Now (θ) |
219.1° |
|
| Sep first |
0.6 |
|
Sep last |
0.602 |
|
Sep. Now (ρ) |
0.602" |
|
| Mag pri |
8.61 |
|
Mag sec |
12.20 |
|
delta mag (ΔM) |
3.59 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+282 |
|
Sec motion ra |
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|
| Pri motion dec |
+020 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 7640 |
|
Constellation |
Pisces |
|
SAO |
92344 |
|
HIP |
5952 |
|
| Tycho2 |
1200-01141-1 |
|
Gaia DR2 |
2785877317611229056 |
|
HD |
7640 |
|
GC |
1530 |
|
| BD |
BD+17 176 |
|
Distance |
63.86 |
|
Distance ly |
208.31 |
|
ORBITAL ELEMENTS
| Period (P) | 143.73y | |
Periastron (T) | 2115.16y | |
Semi-major axis (a) | 0.767a | |
| Eccentricity (e) | 0.575 | |
Inclination (i) | 118.3° | |
Longitude of periastron (ω) | 93.9° | |
| Node (Ω) | 102.7° | |
Notes | n | |
Reference | Hrt2011d | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
253.7 |
0.647 |
| 2001 |
252.4 |
0.647 |
| 2002 |
251.0 |
0.646 |
| 2003 |
249.6 |
0.645 |
| 2004 |
248.3 |
0.643 |
| 2005 |
246.9 |
0.641 |
| 2006 |
245.5 |
0.639 |
| 2007 |
244.1 |
0.637 |
| 2008 |
242.7 |
0.634 |
| 2009 |
241.2 |
0.631 |
| 2010 |
239.8 |
0.628 |
| 2011 |
238.3 |
0.625 |
| 2012 |
236.9 |
0.622 |
| 2013 |
235.4 |
0.619 |
| 2014 |
233.9 |
0.616 |
| 2015 |
232.4 |
0.613 |
| 2016 |
230.8 |
0.609 |
| 2017 |
229.3 |
0.606 |
| 2018 |
227.7 |
0.603 |
| 2019 |
226.1 |
0.600 |
| 2020 |
224.5 |
0.597 |
| 2021 |
222.9 |
0.594 |
| 2022 |
221.3 |
0.591 |
| 2023 |
219.7 |
0.588 |
| 2024 |
218.0 |
0.585 |
| 2025 |
216.3 |
0.583 |
| 2026 |
214.6 |
0.581 |
| 2027 |
212.9 |
0.579 |
| 2028 |
211.2 |
0.577 |
| 2029 |
209.5 |
0.575 |
| 2030 |
207.8 |
0.574 |
| 2031 |
206.0 |
0.572 |
| 2032 |
204.3 |
0.571 |
| 2033 |
202.5 |
0.571 |
| 2034 |
200.8 |
0.570 |
| 2035 |
199.0 |
0.570 |
| 2036 |
197.2 |
0.570 |
| 2037 |
195.5 |
0.570 |
| 2038 |
193.7 |
0.571 |
| 2039 |
192.0 |
0.571 |
| 2040 |
190.2 |
0.572 |
| 2041 |
188.5 |
0.573 |
| 2042 |
186.7 |
0.575 |
| 2043 |
185.0 |
0.577 |
| 2044 |
183.3 |
0.579 |
| 2045 |
181.6 |
0.581 |
| 2046 |
179.9 |
0.583 |
| 2047 |
178.3 |
0.586 |
| 2048 |
176.6 |
0.589 |
| 2049 |
175.0 |
0.592 |
| 2050 |
173.3 |
0.595 |
|
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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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