21001+0731 KUI 102 (HD 199942)
21h 00m 03.95s +07° 30' 58.2" P.A. 191.00 sep 0.2 mag 6.23,8.13 Sp F1Vp dist. 75.82 pc (247.32 l.y.)
| Coord 2000 |
21001+0731 |
|
Discov num |
KUI 102 |
|
Comp |
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Coord arcsec 2000 |
21 00 03.95 +07 30 58.2 |
|
| Date first |
1934 |
|
Date last |
2021 |
|
Obs |
82 |
|
| Pa first |
28 |
|
Pa last |
191.3 |
|
P.A. Now (θ) |
179.9° |
|
| Sep first |
0.3 |
|
Sep last |
0.24 |
|
Sep. Now (ρ) |
0.228" |
|
| Mag pri |
6.23 |
|
Mag sec |
8.13 |
|
delta mag (ΔM) |
1.9 |
|
Spectral class |
F1Vp (yellow-white) |
|
| Pri motion ra |
+046 |
|
Sec motion ra |
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|
| Pri motion dec |
+021 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 199942 |
|
Constellation |
Equuleus |
|
SAO |
126447 |
|
HIP |
103652 |
|
| Tycho2 |
1103-03344-1 |
|
Gaia DR2 |
1737853104945962496 |
|
HD |
199942 |
|
HR |
8038 |
|
| GC |
29309 |
|
BD |
BD+06 4718 |
|
Distance |
75.82 |
|
Distance ly |
247.32 |
|
ORBITAL ELEMENTS
| Period (P) | 58.4y | |
Periastron (T) | 1959.09y | |
Semi-major axis (a) | 0.295a | |
| Eccentricity (e) | 0.295 | |
Inclination (i) | 130.8° | |
Longitude of periastron (ω) | 318.1° | |
| Node (Ω) | 192° | |
Notes | n | |
Reference | Hrt2014b | |
| Equinox | 2000 | |
Last observation | 2006 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
10.4 |
0.341 |
| 2001 |
7.4 |
0.333 |
| 2002 |
4.3 |
0.323 |
| 2003 |
1.0 |
0.311 |
| 2004 |
357.4 |
0.297 |
| 2005 |
353.4 |
0.282 |
| 2006 |
348.9 |
0.265 |
| 2007 |
343.8 |
0.247 |
| 2008 |
337.9 |
0.228 |
| 2009 |
330.8 |
0.209 |
| 2010 |
322.4 |
0.189 |
| 2011 |
312.1 |
0.172 |
| 2012 |
299.6 |
0.157 |
| 2013 |
285.2 |
0.148 |
| 2014 |
269.5 |
0.145 |
| 2015 |
254.0 |
0.150 |
| 2016 |
239.9 |
0.159 |
| 2017 |
227.7 |
0.173 |
| 2018 |
217.3 |
0.187 |
| 2019 |
208.3 |
0.200 |
| 2020 |
200.4 |
0.211 |
| 2021 |
193.2 |
0.220 |
| 2022 |
186.4 |
0.225 |
| 2023 |
179.9 |
0.228 |
| 2024 |
173.5 |
0.229 |
| 2025 |
167.1 |
0.227 |
| 2026 |
160.5 |
0.225 |
| 2027 |
153.8 |
0.221 |
| 2028 |
146.9 |
0.218 |
| 2029 |
139.7 |
0.215 |
| 2030 |
132.4 |
0.213 |
| 2031 |
125.0 |
0.212 |
| 2032 |
117.5 |
0.213 |
| 2033 |
110.2 |
0.215 |
| 2034 |
103.0 |
0.218 |
| 2035 |
96.2 |
0.224 |
| 2036 |
89.7 |
0.230 |
| 2037 |
83.6 |
0.238 |
| 2038 |
77.9 |
0.247 |
| 2039 |
72.6 |
0.256 |
| 2040 |
67.7 |
0.266 |
| 2041 |
63.1 |
0.276 |
| 2042 |
58.9 |
0.287 |
| 2043 |
55.0 |
0.297 |
| 2044 |
51.3 |
0.306 |
| 2045 |
47.8 |
0.315 |
| 2046 |
44.5 |
0.324 |
| 2047 |
41.4 |
0.332 |
| 2048 |
38.5 |
0.339 |
| 2049 |
35.6 |
0.345 |
| 2050 |
32.8 |
0.350 |
|
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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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