20089+6205 STF 2652 (HD 191940)
20h 08m 56.80s +62° 04' 36.0" P.A. 211.00 sep 0.3 mag 7.29,7.78 Sp A0V dist. 252.53 pc (823.75 l.y.)
| Coord 2000 |
20089+6205 |
|
Discov num |
STF2652 |
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Comp |
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Coord arcsec 2000 |
20 08 56.80 +62 04 36.0 |
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| Date first |
1831 |
|
Date last |
2009 |
|
Obs |
76 |
|
| Pa first |
285 |
|
Pa last |
211.2 |
|
P.A. Now (θ) |
211.2° |
|
| Sep first |
0.5 |
|
Sep last |
0.313 |
|
Sep. Now (ρ) |
0.313" |
|
| Mag pri |
7.29 |
|
Mag sec |
7.78 |
|
delta mag (ΔM) |
0.49 |
|
Spectral class |
A0V (white) |
|
| Pri motion ra |
+012 |
|
Sec motion ra |
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| Pri motion dec |
-019 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 191940 |
|
Constellation |
Draco |
|
SAO |
18732 |
|
HIP |
99257 |
|
| Tycho2 |
4236-01106-1 |
|
Gaia DR2 |
2237927966972481792 |
|
HD |
191940 |
|
GC |
27995 |
|
| ADS |
13449 |
|
BD |
BD+61 1975 |
|
Distance |
252.53 |
|
Distance ly |
823.75 |
|
ORBITAL ELEMENTS
| Period (P) | 495y | |
Periastron (T) | 2185y | |
Semi-major axis (a) | 0.495a | |
| Eccentricity (e) | 0.72 | |
Inclination (i) | 111.2° | |
Longitude of periastron (ω) | 85.8° | |
| Node (Ω) | 141.3° | |
Notes | | |
Reference | Zir2014a | |
| Equinox | 2000 | |
Last observation | 2005 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
213.1 |
0.307 |
| 2001 |
212.6 |
0.308 |
| 2002 |
212.1 |
0.308 |
| 2003 |
211.6 |
0.308 |
| 2004 |
211.2 |
0.308 |
| 2005 |
210.7 |
0.309 |
| 2006 |
210.2 |
0.309 |
| 2007 |
209.8 |
0.309 |
| 2008 |
209.3 |
0.310 |
| 2009 |
208.8 |
0.310 |
| 2010 |
208.4 |
0.310 |
| 2011 |
207.9 |
0.311 |
| 2012 |
207.4 |
0.311 |
| 2013 |
207.0 |
0.311 |
| 2014 |
206.5 |
0.312 |
| 2015 |
206.1 |
0.312 |
| 2016 |
205.6 |
0.313 |
| 2017 |
205.1 |
0.313 |
| 2018 |
204.7 |
0.313 |
| 2019 |
204.2 |
0.314 |
| 2020 |
203.8 |
0.314 |
| 2021 |
203.3 |
0.315 |
| 2022 |
202.9 |
0.315 |
| 2023 |
202.4 |
0.315 |
| 2024 |
202.0 |
0.316 |
| 2025 |
201.5 |
0.316 |
| 2026 |
201.1 |
0.317 |
| 2027 |
200.6 |
0.317 |
| 2028 |
200.2 |
0.318 |
| 2029 |
199.8 |
0.318 |
| 2030 |
199.3 |
0.319 |
|
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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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