17305-1446 HU  177

 
 
17H 30M 32.15S -14 46' 21.3" P.A. 202.7 SEP 0.24 MAG 8.50,9.60 SP F0V DIST. 197.63 PC (644.67 L.Y.)
 
 
Coord 2000
17305-1446
Discov num
HU  177
Comp
Coord arcsec 2000
17 30 32.15 -14 46 21.3
Date first
1900
Date last
2015
Obs
16
Pa first
85
Pa last
176
P.A. Now (θ)
202.7°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.24"
Mag pri
8.50
Mag sec
9.60
delta mag (ΔM)
1.1
Spectral class
F0V (yellow-white)
Pri motion ra
-002
Sec motion ra
Pri motion dec
+003
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Serpens
SAO
160594
HIP
85679
Tycho2
5671-00844-1
HD
158561
ADS
10595
BD
BD-14 4665
Distance
197.63
Distance ly
644.67
last precise pa
176.4
last precise sep
0.259
 
 
ORBITAL ELEMENTS
 
 
Period (P)220.41y Periastron (T)1987.21y Semi-major axis (a)0.293a
Eccentricity (e)0.541 Inclination (i)156.3° Longitude of periastron (ω)252.6°
Node (Ω)179.5° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.169 215.1
2001 0.175 211.4
2002 0.180 208.0
2003 0.186 204.8
2004 0.192 201.8
2005 0.198 199.0
2006 0.204 196.3
2007 0.210 193.8
2008 0.215 191.4
2009 0.221 189.1
2010 0.227 186.9
2011 0.232 184.9
2012 0.237 182.9
2013 0.243 181.1
2014 0.248 179.3
2015 0.253 177.5
2016 0.258 175.9
2017 0.263 174.3
2018 0.268 172.8
2019 0.272 171.3
2020 0.277 169.9
2021 0.281 168.5
2022 0.286 167.1
2023 0.290 165.8
2024 0.294 164.6
2025 0.298 163.3
2026 0.302 162.1
2027 0.306 161.0
2028 0.310 159.8
2029 0.314 158.7
2030 0.317 157.6

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