21053+0044 HDS 3007 (HD 200747)
21h 05m 19.23s +00° 43' 37.4" P.A. 281.00 sep 0.1 mag 8.11,9.48 Sp F0 dist. 120.34 pc (392.55 l.y.)
| Coord 2000 |
21053+0044 |
|
Discov num |
HDS3007 |
|
Comp |
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Coord arcsec 2000 |
21 05 19.23 +00 43 37.4 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
10 |
|
| Pa first |
302 |
|
Pa last |
281.4 |
|
P.A. Now (θ) |
281.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.143 |
|
Sep. Now (ρ) |
0.143" |
|
| Mag pri |
8.11 |
|
Mag sec |
9.48 |
|
delta mag (ΔM) |
1.37 |
|
Spectral class |
F0 (yellow-white) |
|
| Pri motion ra |
-010 |
|
Sec motion ra |
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|
| Pri motion dec |
+013 |
|
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 200747 |
|
Constellation |
Aquarius |
|
SAO |
126532 |
|
HIP |
104090 |
|
| Tycho2 |
0526-01687-1 |
|
Gaia DR2 |
2690307492047588736 |
|
HD |
200747 |
|
BD |
BD+00 4657 |
|
| Distance |
120.34 |
|
Distance ly |
392.55 |
|
ORBITAL ELEMENTS
| Period (P) | 26y | |
Periastron (T) | 2005.24y | |
Semi-major axis (a) | 0.117a | |
| Eccentricity (e) | 0.5 | |
Inclination (i) | 116.9° | |
Longitude of periastron (ω) | 127.1° | |
| Node (Ω) | 267.1° | |
Notes | | |
Reference | Tok2021c | |
| Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
267.9 |
0.128 |
| 2001 |
262.8 |
0.113 |
| 2002 |
255.8 |
0.092 |
| 2003 |
243.6 |
0.065 |
| 2004 |
210.5 |
0.035 |
| 2005 |
130.4 |
0.035 |
| 2006 |
95.4 |
0.060 |
| 2007 |
78.9 |
0.072 |
| 2008 |
65.2 |
0.074 |
| 2009 |
50.9 |
0.070 |
| 2010 |
34.5 |
0.065 |
| 2011 |
16.5 |
0.064 |
| 2012 |
358.6 |
0.066 |
| 2013 |
342.6 |
0.072 |
| 2014 |
329.6 |
0.080 |
| 2015 |
319.4 |
0.090 |
| 2016 |
311.3 |
0.101 |
| 2017 |
304.7 |
0.112 |
| 2018 |
299.2 |
0.121 |
| 2019 |
294.5 |
0.130 |
| 2020 |
290.3 |
0.137 |
| 2021 |
286.5 |
0.142 |
| 2022 |
282.9 |
0.145 |
| 2023 |
279.4 |
0.146 |
| 2024 |
275.8 |
0.143 |
| 2025 |
272.1 |
0.138 |
| 2026 |
267.9 |
0.128 |
| 2027 |
262.8 |
0.113 |
| 2028 |
255.8 |
0.092 |
| 2029 |
243.6 |
0.065 |
| 2030 |
210.5 |
0.035 |
|
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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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