15559-0210 STF1985

 
 
15h 55m 54.63s -02 09' 51.3" P.A. 355.00 sep 6.0 mag 7.03,8.65 Sp F8V dist. 36.9 pc (120.37 l.y.)
 
 
Coord 2000
15559-0210
Discov num
STF1985
Comp
Coord arcsec 2000
15 55 54.63 -02 09 51.3
Date first
1823
Date last
2020
Obs
191
Pa first
325
Pa last
354
P.A. Now (θ)
355°
Sep first
6.8
Sep last
6.2
Sep. Now (ρ)
6.04"
Mag pri
7.03
Mag sec
8.65
delta mag (ΔM)
1.62
Spectral class
F8V (yellow-white)
Pri motion ra
-089
Sec motion ra
-089
Pri motion dec
-061
Sec motion dec
-061
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
354.4
Precise sep
6.15
Constellation
Hydra
HIP
78024
Tycho2
5023-00606-1
Gaia DR2
4409032079673958528
HD
142661
ADS
9842
BD
BD-01 3118
Distance
36.9
Distance ly
120.37
last precise pa
354.4
last precise sep
6.15
 
 
ORBITAL ELEMENTS
 
 
Period (P)2307.2358y± 1063.2839 Periastron (T)1650.0128y± 223.5323 Semi-major axis (a)12.59388a± 6.03082
Eccentricity (e)0.7909± 0.15064 Inclination (i)68.192°± 10.417 Longitude of periastron (ω)109.886°± 22.101
Node (Ω)112.512°± 43.18 Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 5.998 351.7
2001 6.000 351.9
2002 6.002 352.0
2003 6.004 352.2
2004 6.006 352.4
2005 6.008 352.5
2006 6.011 352.7
2007 6.013 352.8
2008 6.015 353.0
2009 6.017 353.1
2010 6.019 353.3
2011 6.021 353.4
2012 6.023 353.6
2013 6.026 353.8
2014 6.028 353.9
2015 6.030 354.1
2016 6.032 354.2
2017 6.034 354.4
2018 6.037 354.5
2019 6.039 354.7
2020 6.041 354.8
2021 6.044 355.0
2022 6.046 355.1
2023 6.048 355.3
2024 6.051 355.5
2025 6.053 355.6
2026 6.055 355.8
2027 6.058 355.9
2028 6.060 356.1
2029 6.063 356.2
2030 6.065 356.4


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



 
 


wds15559-0210b.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
15559-0210 STF1985 2007 168 351 6.2 7.03 8.65 F8V NOD 155554.63-020951.3
15559-0210 STF1985 2008 172 354 6.1 7.03 8.65 F8V NOD 155554.63-020951.3
15559-0210 STF1985 2010 174 353 6.0 7.03 8.65 F8V NOD 155554.63-020951.3
15559-0210 STF1985 2012 175 354 6.0 7.03 8.65 F8V NOD 155554.63-020951.3
15559-0210 STF1985 2013 177 353 5.9 7.03 8.65 F8V NOD 155554.63-020951.3
15559-0210 STF1985 2015 179 354 6.1 7.03 8.65 F8V NO 155554.63-020951.3
15559-0210 STF1985 2017 183 346 5.9 7.03 8.65 F8V NO 155554.63-020951.3
15559-0210 STF1985 2018 185 357 6.0 7.03 8.65 F8V NO 155554.63-020951.3
15559-0210 STF1985 2019 188 357 6.1 7.03 8.65 F8V NO 155554.63-020951.3
15559-0210 STF1985 2020 190 354 6.2 7.03 8.65 F8V NO 155554.63-020951.3

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