18039-2422 SNA 78 (9 Sgr)
18h 03m 52.44s -24° 21' 38.6" P.A. 69.00 sep 0.0 mag 6.30,6.80 Sp O4V dist. 2040.82 pc (6657.15 l.y.)
Coord 2000 |
18039-2422 |
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Discov num |
SNA 78 |
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Comp |
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Coord arcsec 2000 |
18 03 52.44 -24 21 38.6 |
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Date first |
2009 |
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Date last |
2017 |
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Obs |
24 |
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Pa first |
70 |
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Pa last |
69 |
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P.A. Now (θ) |
69° |
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Sep first |
0.0 |
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Sep last |
0.022 |
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Sep. Now (ρ) |
0.022" |
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Mag pri |
6.30 |
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Mag sec |
6.80 |
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delta mag (ΔM) |
0.5 |
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Spectral class |
O4V (blue) |
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Pri motion ra |
+000 |
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Sec motion ra |
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Pri motion dec |
-002 |
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Sec motion dec |
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Notes |
N
V
K
(See Notes, Proper motion indicates physical, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
9 Sgr |
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Constellation |
Sagittarius |
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SAO |
186204 |
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HIP |
88469 |
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Tycho2 |
6842-01702-1 |
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Gaia DR2 |
4066022591147527552 |
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HD |
164794 |
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HR |
6736 |
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GC |
24574 |
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CD |
CD-2413814 |
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CP |
CP-24 6144 |
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Flamsteed |
9 Sagittarii |
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Flamsteed name |
9 Sgr |
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Distance |
2040.82 |
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Distance ly |
6657.15 |
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ORBITAL ELEMENTS
Period (P) | 3310.4d (9.06y) | ± 7 |
Periastron (T) | 46613d (1986.498y) | ± 21 |
Semi-major axis (a) | 14.78m | ± 0.13 |
Eccentricity (e) | 0.6508 | ± 0.0039 |
Inclination (i) | 86.64° | ± 0.53 |
Longitude of periastron (ω) | 210.4° | ± 1.3 |
Node (Ω) | 67.21° | ± 0.51 |
Notes | | |
Reference | LeB2017 | |
Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
69.1 |
0.021 |
2001-01-01 |
70.1 |
0.018 |
2002-01-01 |
71.7 |
0.013 |
2003-01-01 |
77.3 |
0.005 |
2004-01-01 |
239.2 |
0.004 |
2005-01-01 |
53.5 |
0.002 |
2006-01-01 |
66.1 |
0.014 |
2007-01-01 |
67.4 |
0.020 |
2008-01-01 |
68.2 |
0.022 |
2009-01-01 |
69.0 |
0.021 |
2010-01-01 |
70.0 |
0.018 |
2011-01-01 |
71.6 |
0.013 |
2012-01-01 |
76.5 |
0.006 |
2013-01-01 |
237.0 |
0.003 |
2014-01-01 |
32.0 |
0.001 |
2015-01-01 |
66.0 |
0.014 |
2016-01-01 |
67.4 |
0.020 |
2017-01-01 |
68.2 |
0.022 |
2018-01-01 |
69.0 |
0.022 |
2019-01-01 |
69.9 |
0.019 |
2020-01-01 |
71.5 |
0.013 |
2021-01-01 |
75.9 |
0.006 |
2022-01-01 |
234.0 |
0.003 |
2023-01-01 |
278.6 |
0.001 |
2024-01-01 |
65.9 |
0.013 |
2025-01-01 |
67.3 |
0.020 |
2026-01-01 |
68.1 |
0.022 |
2027-01-01 |
68.9 |
0.022 |
2028-01-01 |
69.9 |
0.019 |
2029-01-01 |
71.3 |
0.014 |
2030-01-01 |
75.3 |
0.007 |
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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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