21208-4049 HDS 3039 (The1 Mic)
21h 20m 45.58s -40° 48' 34.2" P.A. 13.00 sep 0.2 mag 4.93,7.42 Sp A2p dist. 60.46 pc (197.22 l.y.)
| Coord 2000 |
21208-4049 |
|
Discov num |
HDS3039 |
|
Comp |
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Coord arcsec 2000 |
21 20 45.58 -40 48 34.2 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
8 |
|
| Pa first |
1 |
|
Pa last |
13.3 |
|
P.A. Now (θ) |
6.7° |
|
| Sep first |
0.1 |
|
Sep last |
0.176 |
|
Sep. Now (ρ) |
0.157" |
|
| Mag pri |
4.93 |
|
Mag sec |
7.42 |
|
delta mag (ΔM) |
2.49 |
|
Spectral class |
A2p (white) |
|
| Pri motion ra |
+076 |
|
Sec motion ra |
|
|
| Pri motion dec |
+018 |
|
Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
The1 Mic |
|
Constellation |
Microscopium |
|
SAO |
230644 |
|
HIP |
105382 |
|
| Tycho2 |
7983-01200-1 |
|
Gaia DR2 |
6582113664036653824 |
|
HD |
203006 |
|
HR |
8151 |
|
| GC |
29854 |
|
CD |
CD-4114475 |
|
CP |
CP-41 9606 |
|
Bayer |
Theta 1 Microscopii |
|
| Bayer name |
The1 Mic |
|
FK5 |
802 |
|
Distance |
60.46 |
|
Distance ly |
197.22 |
|
| Bayer greek |
θ1 Mic |
|
ORBITAL ELEMENTS
| Period (P) | 32.34y | |
Periastron (T) | 2019.76y | |
Semi-major axis (a) | 0.265a | |
| Eccentricity (e) | 0.39 | |
Inclination (i) | 106.1° | |
Longitude of periastron (ω) | 146.5° | |
| Node (Ω) | 200.7° | |
Notes | | |
Reference | Tok2020g | |
| Equinox | 2000 | |
Last observation | 2019 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
220.9 |
0.228 |
| 2001 |
217.5 |
0.256 |
| 2002 |
214.7 |
0.280 |
| 2003 |
212.4 |
0.302 |
| 2004 |
210.3 |
0.319 |
| 2005 |
208.4 |
0.332 |
| 2006 |
206.6 |
0.341 |
| 2007 |
205.0 |
0.345 |
| 2008 |
203.3 |
0.344 |
| 2009 |
201.6 |
0.338 |
| 2010 |
199.8 |
0.326 |
| 2011 |
197.8 |
0.308 |
| 2012 |
195.5 |
0.283 |
| 2013 |
192.7 |
0.251 |
| 2014 |
188.9 |
0.211 |
| 2015 |
183.2 |
0.165 |
| 2016 |
172.5 |
0.112 |
| 2017 |
143.6 |
0.063 |
| 2018 |
76.0 |
0.058 |
| 2019 |
41.7 |
0.103 |
| 2020 |
28.7 |
0.146 |
| 2021 |
20.8 |
0.169 |
| 2022 |
14.1 |
0.171 |
| 2023 |
6.7 |
0.157 |
| 2024 |
357.2 |
0.133 |
| 2025 |
343.0 |
0.106 |
| 2026 |
320.2 |
0.084 |
| 2027 |
289.1 |
0.080 |
| 2028 |
261.9 |
0.095 |
| 2029 |
244.6 |
0.123 |
| 2030 |
234.1 |
0.154 |
|
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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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