15339-1700 HDS2185

 
 
15h 33m 56.80s -17 00' 08.2" P.A. 176.3 sep 0.37 mag 8.55,9.78 Sp K0V dist. 38.68 pc (126.17 l.y.)
 
 
Coord 2000
15339-1700
Discov num
HDS2185
Comp
Coord arcsec 2000
15 33 56.80 -17 00 08.2
Date first
1991
Date last
2015
Obs
10
Pa first
326
Pa last
160
P.A. Now (θ)
176.3°
Sep first
0.7
Sep last
0.4
Sep. Now (ρ)
0.37"
Mag pri
8.55
Mag sec
9.78
delta mag (ΔM)
1.23
Spectral class
K0V (yellow-orange)
Pri motion ra
-088
Sec motion ra
-088
Pri motion dec
-324
Sec motion dec
-324
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
160.4
Precise sep
0.396
Constellation
Libra
SAO
159349
HIP
76203
Tycho2
6188-00764-1
HD
138648
BD
BD-16 4112
Distance
38.68
Distance ly
126.17
last precise pa
174.6
last precise sep
0.424
 
 
ORBITAL ELEMENTS
 
 
Period (P)72.32y± 2.2 Periastron (T)2010.26y± 0.1 Semi-major axis (a)0.5757a± 0.0069
Eccentricity (e)0.414± 0.012 Inclination (i)34.6°± 1 Longitude of periastron (ω)310.3°± 1.1
Node (Ω)150.6°± 1.1 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.487 357.3
2001 0.457 2.9
2002 0.426 9.2
2003 0.396 16.6
2004 0.366 25.1
2005 0.339 35.1
2006 0.316 46.7
2007 0.299 59.9
2008 0.291 74.2
2009 0.292 88.8
2010 0.301 102.9
2011 0.315 116.0
2012 0.333 127.8
2013 0.352 138.3
2014 0.371 147.8
2015 0.388 156.4
2016 0.403 164.3
2017 0.417 171.6
2018 0.430 178.5
2019 0.443 185.0
2020 0.454 191.1
2021 0.465 197.0
2022 0.476 202.5
2023 0.488 207.8
2024 0.499 212.9
2025 0.510 217.8
2026 0.522 222.4
2027 0.533 226.9
2028 0.545 231.1
2029 0.557 235.2
2030 0.569 239.1

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

grafico orbita





wds15339-1700e.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
15339-1700 HDS2185 2004 4 26 0.4 8.55 9.78 K0V D 153356.80-170008.2
15339-1700 HDS2185 2009 5 272 0.3 8.55 9.78 K0V D 153356.80-170008.2
15339-1700 HDS2185 2012 8 310 0.3 8.55 9.78 K0V OD 153356.80-170008.2
15339-1700 HDS2185 2013 9 140 0.4 8.55 9.78 K0V OD 153356.80-170008.2
15339-1700 HDS2185 2015 10 161 0.4 8.55 9.78 K0V NO 153356.80-170008.2

If you need more information about this double, apply for a data request form to the WDS.