09510-8004 HDS1421

 
 
09h 51m 00.80s -80 03' 39.9" P.A. 343.30 sep 0.1 mag 6.68,8.61 Sp B8IV dist. 256.41 pc (836.41 l.y.)
 
 
Coord 2000
09510-8004
Discov num
HDS1421
Comp
Coord arcsec 2000
09 51 00.80 -80 03 39.9
Date first
1991
Date last
2019
Obs
17
Pa first
119
Pa last
335
P.A. Now (θ)
343.3°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.11"
Mag pri
6.68
Mag sec
8.61
delta mag (ΔM)
1.93
Spectral class
B8IV (blue-white)
Pri motion ra
-003
Sec motion ra
Pri motion dec
+015
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
335
Precise sep
0.103
Constellation
Chamaeleon
SAO
256666
HIP
48320
Tycho2
9404-01549-1
Gaia DR2
5201784945460884224
HD
86320
CP
CP-79 457
Distance
256.41
Distance ly
836.41
last precise pa
335
last precise sep
0.103
 
 
ORBITAL ELEMENTS
 
 
Period (P)107.3y± 22.3 Periastron (T)2013.84y± 0.33 Semi-major axis (a)0.186a± 0.018
Eccentricity (e)0.614± 0.054 Inclination (i)31.1°± 6.5 Longitude of periastron (ω)125.3°± 5.6
Node (Ω)132.7°± 7.2 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2021
label rho theta
2000 0.168 136.7
2001 0.161 139.6
2002 0.153 142.8
2003 0.144 146.4
2004 0.135 150.4
2005 0.126 155.0
2006 0.116 160.4
2007 0.106 166.7
2008 0.096 174.4
2009 0.087 183.7
2010 0.078 195.4
2011 0.070 209.9
2012 0.065 227.2
2013 0.064 246.3
2014 0.066 265.2
2015 0.070 282.3
2016 0.077 296.9
2017 0.083 309.2
2018 0.090 319.6
2019 0.097 328.6
2020 0.104 336.4
2021 0.110 343.3
2022 0.116 349.4
2023 0.122 355.0
2024 0.128 360.0
2025 0.134 4.5
2026 0.139 8.7
2027 0.145 12.6
2028 0.150 16.2
2029 0.156 19.6
2030 0.161 22.7


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



 
 


wds09510-8004b.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
09510-8004 HDS1421 1991 1 119 0.2 6.68 8.61 B8IV 095100.80-800339.9
09510-8004 HDS1421 2015 5 296 0.1 6.68 8.61 B8IV 095100.80-800339.9
09510-8004 HDS1421 2016 10 317 0.1 6.68 8.61 B8IV O 095100.80-800339.9
09510-8004 HDS1421 2018 14 327 0.1 6.68 8.61 B8IV O 095100.80-800339.9
09510-8004 HDS1421 2019 17 335 0.1 6.68 8.61 B8IV O 095100.80-800339.9

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