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 Discov num SNA  78 Comp Coord arcsec 2000 18 03 52.44 -24 21 38.6
Date first 2009 Date last 2017 Obs 24
Pa first 70 Pa last 69 P.A. Now (θ) 69°
Sep first 0.0 Sep last 0.022 Sep. Now (ρ) 0.022"
Mag pri 6.30 Mag sec 6.80 delta mag (ΔM) 0.5 Spectral class O4V (blue)
Pri motion ra +000 Sec motion ra
Pri motion dec -002 Sec motion dec
Notes N V K (See Notes, Proper motion indicates physical, K-band or other infrared magnitudes)
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 Constellation Sagittarius SAO 186204 HIP 88469
Tycho2 6842-01702-1 Gaia DR2 4066022591147527552 HD 164794 HR 6736
GC 24574 CD CD-2413814 CP CP-24 6144 Flamsteed 9 Sagittarii
Flamsteed name 9 Sgr Distance 2040.82 Distance ly 6657.15
 
 
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 ReferenceLeB2017
Equinox Last observation Grade5(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


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds18039-2422a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic