15493+6032 HU  912

 
 
15H 49M 15.70S +60 31' 38.5" P.A. 142.4 SEP 0.34 MAG 8.60,9.01 SP F5 DIST. 94.07 PC (306.86 L.Y.)
 
 
Coord 2000
15493+6032
Discov num
HU  912
Comp
Coord arcsec 2000
15 49 15.70 +60 31 38.5
Date first
1905
Date last
2008
Obs
58
Pa first
138
Pa last
132
P.A. Now (θ)
142.4°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.34"
Mag pri
8.60
Mag sec
9.01
delta mag (ΔM)
0.41
Spectral class
F5 (yellow-white)
Pri motion ra
-091
Sec motion ra
Pri motion dec
+021
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
16860
HIP
77482
Tycho2
4182-00450-1
HD
142089
ADS
9806
BD
BD+60 1637
Distance
94.07
Distance ly
306.86
last precise pa
131.7
last precise sep
0.317
 
 
ORBITAL ELEMENTS
 
 
Period (P)109y Periastron (T)1988.5y Semi-major axis (a)0.32a
Eccentricity (e)0.67 Inclination (i)54° Longitude of periastron (ω)260°
Node (Ω)102° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.255 114.0
2001 0.264 116.2
2002 0.273 118.2
2003 0.281 120.2
2004 0.288 122.0
2005 0.295 123.7
2006 0.300 125.4
2007 0.306 127.0
2008 0.310 128.6
2009 0.315 130.1
2010 0.318 131.5
2011 0.322 133.0
2012 0.325 134.4
2013 0.328 135.8
2014 0.330 137.1
2015 0.332 138.5
2016 0.334 139.8
2017 0.335 141.1
2018 0.337 142.4
2019 0.338 143.7
2020 0.339 145.0
2021 0.339 146.3
2022 0.340 147.6
2023 0.340 148.9
2024 0.340 150.2
2025 0.340 151.4
2026 0.340 152.7
2027 0.340 154.0
2028 0.339 155.3
2029 0.339 156.5
2030 0.338 157.8

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic