19210+3931 MLB 861 (Ups Sgr)
19h 21m 00.00s +39° 31' 00.0" P.A. 114.00 sep 5.6 mag 9.50,10.00 dist. 546.45 pc (1782.52 l.y.)
Coord 2000 |
19210+3931 |
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Discov num |
MLB 861 |
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Comp |
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Coord arcsec 2000 |
19 21 00.00 +39 31 00.0 |
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Date first |
1933 |
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Date last |
1933 |
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Obs |
1 |
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Pa first |
114 |
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Pa last |
114.1 |
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P.A. Now (θ) |
114.1° |
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Sep first |
5.6 |
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Sep last |
5.64 |
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Sep. Now (ρ) |
5.64" |
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Mag pri |
9.50 |
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Mag sec |
10.00 |
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delta mag (ΔM) |
0.5 |
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Spectral class |
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Pri motion ra |
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Sec motion ra |
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Pri motion dec |
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Sec motion dec |
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Notes |
X
(Dubious double) |
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Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
Name |
Ups Sgr |
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Spectr |
F2p |
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Constellation |
Lyra |
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SAO |
162518 |
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HIP |
95176 |
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Tycho2 |
6297-01419-1 |
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HD |
181615 |
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HR |
7342 |
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GC |
26697 |
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BD |
BD-16 5283 |
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Bayer |
Upsilon Sagittarii |
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Bayer name |
Ups Sgr |
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FK5 |
727 |
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Coordinate calcolate |
1 |
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Distance |
546.45 |
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Distance ly |
1782.52 |
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Coordinate calculated |
yes |
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Bayer greek |
υ Sgr |
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Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Sgr vs Lyr)
ORBITAL ELEMENTS
Period (P) | 137.9343d | |
Periastron (T) | 33018.1d (1949.276y) | |
Semi-major axis (a) | 2.1m | ± 0.3 |
Eccentricity (e) | 0 | |
Inclination (i) | 50° | ± 10 |
Longitude of periastron (ω) | 0° | |
Node (Ω) | 80° | ± 10 |
Notes | n | |
Reference | Bnu2011 | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 8 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
203.6 |
0.001 |
2001-01-01 |
71.2 |
0.002 |
2002-01-01 |
288.1 |
0.002 |
2003-01-01 |
174.5 |
0.001 |
2004-01-01 |
56.7 |
0.002 |
2005-01-01 |
272.8 |
0.002 |
2006-01-01 |
144.1 |
0.001 |
2007-01-01 |
38.5 |
0.002 |
2008-01-01 |
259.5 |
0.002 |
2009-01-01 |
119.9 |
0.002 |
2010-01-01 |
13.7 |
0.001 |
2011-01-01 |
246.1 |
0.002 |
2012-01-01 |
102.1 |
0.002 |
2013-01-01 |
343.0 |
0.001 |
2014-01-01 |
230.6 |
0.002 |
2015-01-01 |
87.8 |
0.002 |
2016-01-01 |
314.4 |
0.002 |
2017-01-01 |
210.2 |
0.002 |
2018-01-01 |
74.7 |
0.002 |
2019-01-01 |
292.8 |
0.002 |
2020-01-01 |
182.8 |
0.001 |
2021-01-01 |
60.8 |
0.002 |
2022-01-01 |
276.6 |
0.002 |
2023-01-01 |
151.9 |
0.001 |
2024-01-01 |
43.9 |
0.002 |
2025-01-01 |
263.0 |
0.002 |
2026-01-01 |
125.7 |
0.002 |
2027-01-01 |
21.0 |
0.001 |
2028-01-01 |
249.8 |
0.002 |
2029-01-01 |
106.4 |
0.002 |
2030-01-01 |
351.4 |
0.001 |
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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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