00095+1907 COU 247 (HD 489)
00h 09m 28.15s +19° 06' 56.8" P.A. 213.00 sep 0.3 mag 8.29,9.98 Sp G3V dist. 68.12 pc (222.21 l.y.)
| Coord 2000 |
00095+1907 |
|
Discov num |
COU 247 |
|
Comp |
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Coord arcsec 2000 |
00 09 28.15 +19 06 56.8 |
|
| Date first |
1967 |
|
Date last |
2017 |
|
Obs |
37 |
|
| Pa first |
31 |
|
Pa last |
213.2 |
|
P.A. Now (θ) |
213.2° |
|
| Sep first |
0.4 |
|
Sep last |
0.32 |
|
Sep. Now (ρ) |
0.32" |
|
| Mag pri |
8.29 |
|
Mag sec |
9.98 |
|
delta mag (ΔM) |
1.69 |
|
Spectral class |
G3V (yellow) |
|
| Pri motion ra |
+267 |
|
Sec motion ra |
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|
| Pri motion dec |
+024 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 489 |
|
Constellation |
Pegasus |
|
SAO |
91742 |
|
HIP |
768 |
|
| Tycho2 |
1181-00051-1 |
|
Gaia DR2 |
2798013314642147968 |
|
HD |
489 |
|
GC |
157 |
|
| BD |
BD+18 3 |
|
Distance |
68.12 |
|
Distance ly |
222.21 |
|
ORBITAL ELEMENTS
| Period (P) | 159.51y | |
Periastron (T) | 2005.8y | |
Semi-major axis (a) | 0.543a | |
| Eccentricity (e) | 0.309 | |
Inclination (i) | 137° | |
Longitude of periastron (ω) | 103.4° | |
| Node (Ω) | 21.1° | |
Notes | | |
Reference | Doc2012i | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
307.7 |
0.286 |
| 2001 |
301.9 |
0.281 |
| 2002 |
296.0 |
0.278 |
| 2003 |
289.9 |
0.276 |
| 2004 |
283.8 |
0.276 |
| 2005 |
277.8 |
0.278 |
| 2006 |
271.9 |
0.282 |
| 2007 |
266.2 |
0.287 |
| 2008 |
260.6 |
0.293 |
| 2009 |
255.4 |
0.301 |
| 2010 |
250.5 |
0.310 |
| 2011 |
245.8 |
0.320 |
| 2012 |
241.4 |
0.330 |
| 2013 |
237.3 |
0.341 |
| 2014 |
233.4 |
0.351 |
| 2015 |
229.8 |
0.362 |
| 2016 |
226.4 |
0.373 |
| 2017 |
223.1 |
0.384 |
| 2018 |
220.1 |
0.394 |
| 2019 |
217.2 |
0.404 |
| 2020 |
214.4 |
0.414 |
| 2021 |
211.7 |
0.423 |
| 2022 |
209.2 |
0.432 |
| 2023 |
206.8 |
0.440 |
| 2024 |
204.4 |
0.448 |
| 2025 |
202.2 |
0.455 |
| 2026 |
200.0 |
0.462 |
| 2027 |
197.8 |
0.468 |
| 2028 |
195.7 |
0.474 |
| 2029 |
193.7 |
0.479 |
| 2030 |
191.7 |
0.484 |
| 2031 |
189.7 |
0.488 |
| 2032 |
187.8 |
0.492 |
| 2033 |
185.9 |
0.496 |
| 2034 |
184.0 |
0.499 |
| 2035 |
182.2 |
0.502 |
| 2036 |
180.4 |
0.504 |
| 2037 |
178.5 |
0.506 |
| 2038 |
176.7 |
0.508 |
| 2039 |
175.0 |
0.509 |
| 2040 |
173.2 |
0.511 |
| 2041 |
171.4 |
0.512 |
| 2042 |
169.6 |
0.512 |
| 2043 |
167.9 |
0.513 |
| 2044 |
166.1 |
0.513 |
| 2045 |
164.4 |
0.513 |
| 2046 |
162.6 |
0.514 |
| 2047 |
160.8 |
0.513 |
| 2048 |
159.1 |
0.513 |
| 2049 |
157.3 |
0.513 |
| 2050 |
155.6 |
0.513 |
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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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