16137+4638 A  1642

 
 
16H 13M 43.62S +46 38' 23.1" P.A. 179.8 SEP 0.79 MAG 8.87,9.39 SP G0 DIST. 81.77 PC (266.73 L.Y.)
 
 
Coord 2000
16137+4638
Discov num
A  1642
Comp
Coord arcsec 2000
16 13 43.62 +46 38 23.1
Date first
1907
Date last
2015
Obs
55
Pa first
359
Pa last
181
P.A. Now (θ)
179.8°
Sep first
0.6
Sep last
0.8
Sep. Now (ρ)
0.79"
Mag pri
8.87
Mag sec
9.39
delta mag (ΔM)
0.52
Spectral class
G0 (yellow)
Pri motion ra
-099
Sec motion ra
-099
Pri motion dec
+040
Sec motion dec
+040
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
45976
HIP
79526
Tycho2
3491-00279-1
HD
146327
ADS
9975
BD
BD+47 2317
Distance
81.77
Distance ly
266.73
last precise pa
180.6
last precise sep
0.82
 
 
ORBITAL ELEMENTS
 
 
Period (P)188.61y Periastron (T)1892.3y Semi-major axis (a)0.719a
Eccentricity (e)0.271 Inclination (i)99.3° Longitude of periastron (ω)120.4°
Node (Ω)176.1° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.654 185.0
2001 0.665 184.7
2002 0.676 184.3
2003 0.686 184.0
2004 0.695 183.7
2005 0.705 183.4
2006 0.714 183.1
2007 0.723 182.8
2008 0.731 182.5
2009 0.738 182.2
2010 0.746 181.9
2011 0.753 181.7
2012 0.759 181.4
2013 0.765 181.1
2014 0.771 180.9
2015 0.776 180.6
2016 0.780 180.3
2017 0.785 180.1
2018 0.788 179.8
2019 0.791 179.6
2020 0.794 179.4
2021 0.796 179.1
2022 0.797 178.9
2023 0.798 178.6
2024 0.798 178.4
2025 0.798 178.1
2026 0.797 177.9
2027 0.796 177.7
2028 0.794 177.4
2029 0.791 177.2
2030 0.788 176.9

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