20523-4000 SKF 1097
20h 52m 16.39s -39° 59' 50.5" P.A. 2.00 sep 9.6 mag 10.50,17.00 Sp K5 dist. 35.32 pc (115.21 l.y.)
| Coord 2000 |
20523-4000 |
|
Discov num |
SKF1097 |
|
Comp |
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Coord arcsec 2000 |
20 52 16.39 -39 59 50.5 |
|
| Date first |
1996 |
|
Date last |
2015 |
|
Obs |
4 |
|
| Pa first |
4 |
|
Pa last |
2.3 |
|
P.A. Now (θ) |
2.3° |
|
| Sep first |
9.2 |
|
Sep last |
9.561 |
|
Sep. Now (ρ) |
9.561" |
|
| Mag pri |
10.50 |
|
Mag sec |
17.00 |
|
delta mag (ΔM) |
6.5 |
|
Spectral class |
K5 (yellow-orange) |
|
| Pri motion ra |
+117 |
|
Sec motion ra |
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|
| Pri motion dec |
-165 |
|
Sec motion dec |
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| Notes |
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Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Microscopium |
|
HIP |
103019 |
|
Tycho2 |
7968-00039-1 |
|
Gaia DR2 |
6678530491511225856 |
|
| CD |
CD-4014067 |
|
CP |
CP-40 9390 |
|
Distance |
35.32 |
|
Distance ly |
115.21 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 20523-4000 |
| coord_arcsec_2000 | 205216.39-395950.5 |
| Period (P) | 917.3d (2.51y) | ± 1.1 |
Periastron (T) | 54681.5d (2008.589y) | ± 0.2 |
Semi-major axis (a) | 10.8m | ± 1.3 |
| Eccentricity (e) | 0.502 | ± 0.001 |
Inclination (i) | 160.9° | ± 2.5 |
Longitude of periastron (ω) | 74.2° | ± 0.1 |
| Node (Ω) | 143.1° | ± 8.6 |
Notes | | |
Reference | SaJ2011 | |
| Equinox | | |
Last observation | | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
238.0 |
0.015 |
| 2001-01-01 |
97.1 |
0.005 |
| 2002-01-01 |
268.0 |
0.015 |
| 2003-01-01 |
202.4 |
0.012 |
| 2004-01-01 |
308.7 |
0.011 |
| 2005-01-01 |
239.4 |
0.015 |
| 2006-01-01 |
107.4 |
0.006 |
| 2007-01-01 |
269.4 |
0.015 |
| 2008-01-01 |
204.6 |
0.012 |
| 2009-01-01 |
311.5 |
0.011 |
| 2010-01-01 |
240.7 |
0.015 |
| 2011-01-01 |
116.8 |
0.006 |
| 2012-01-01 |
270.8 |
0.015 |
| 2013-01-01 |
206.6 |
0.012 |
| 2014-01-01 |
314.4 |
0.010 |
| 2015-01-01 |
242.1 |
0.015 |
| 2016-01-01 |
125.2 |
0.006 |
| 2017-01-01 |
272.3 |
0.015 |
| 2018-01-01 |
208.6 |
0.013 |
| 2019-01-01 |
317.5 |
0.010 |
| 2020-01-01 |
243.4 |
0.015 |
| 2021-01-01 |
132.9 |
0.007 |
| 2022-01-01 |
273.8 |
0.014 |
| 2023-01-01 |
210.6 |
0.013 |
| 2024-01-01 |
320.8 |
0.010 |
| 2025-01-01 |
244.8 |
0.015 |
| 2026-01-01 |
139.8 |
0.007 |
| 2027-01-01 |
275.3 |
0.014 |
| 2028-01-01 |
212.4 |
0.013 |
| 2029-01-01 |
324.3 |
0.009 |
| 2030-01-01 |
246.1 |
0.015 |
|
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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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