15071-0217 A   689

 
 
15h 07m 08.61s -02 16' 50.5" P.A. 325.60 sep 0.3 mag 8.20,8.70 Sp F8 dist. 95.24 pc (310.67 l.y.)
 
 
Coord 2000
15071-0217
Discov num
A   689
Comp
Coord arcsec 2000
15 07 08.61 -02 16 50.5
Date first
1904
Date last
2016
Obs
43
Pa first
315
Pa last
327
P.A. Now (θ)
325.6°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.32"
Mag pri
8.20
Mag sec
8.70
delta mag (ΔM)
0.5
Spectral class
F8 (yellow-white)
Pri motion ra
-071
Sec motion ra
Pri motion dec
+009
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
326.5
Precise sep
0.334
Constellation
Libra
HIP
73982
Tycho2
5004-00384-1
Gaia DR2
6339618745351109376
HD
133928
ADS
9504
BD
BD-01 3021
Distance
95.24
Distance ly
310.67
last precise pa
326.5
last precise sep
0.334
 
 
ORBITAL ELEMENTS
 
 
Period (P)66y Periastron (T)1935.6y Semi-major axis (a)0.31a
Eccentricity (e)0.88 Inclination (i)103.9° Longitude of periastron (ω)65°
Node (Ω)164° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation1982
label rho theta
2000 0.074 180.0
2001 0.057 167.0
2002 0.029 3.1
2003 0.101 345.0
2004 0.146 341.1
2005 0.178 338.8
2006 0.203 337.1
2007 0.223 335.8
2008 0.240 334.7
2009 0.255 333.7
2010 0.267 332.9
2011 0.277 332.0
2012 0.286 331.3
2013 0.293 330.6
2014 0.299 329.9
2015 0.304 329.2
2016 0.309 328.6
2017 0.312 328.0
2018 0.315 327.4
2019 0.316 326.8
2020 0.317 326.2
2021 0.318 325.6
2022 0.318 325.0
2023 0.317 324.4
2024 0.316 323.8
2025 0.314 323.2
2026 0.312 322.6
2027 0.310 322.0
2028 0.307 321.3
2029 0.303 320.7
2030 0.299 320.0


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



 
 


wds15071-0217a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15071-0217 A 689 1993 39 329 0.1 8.20 8.70 F8 NO 150708.61-021650.5
15071-0217 A 689 2009 41 331 0.3 8.20 8.70 F8 NO 150708.61-021650.5
15071-0217 A 689 2015 42 327 0.3 8.20 8.70 F8 O 150708.61-021650.5
15071-0217 A 689 2016 43 327 0.3 8.20 8.70 F8 O 150708.61-021650.5

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