18033+3921 STF2275

 
 
18H 03M 17.38S +39 20' 58.5" P.A. 305.8 SEP 0.32 MAG 10.11,10.16 SP G0 DIST. 123.92 PC (404.23 L.Y.)
 
 
Coord 2000
18033+3921
Discov num
STF2275
Comp
Coord arcsec 2000
18 03 17.38 +39 20 58.5
Date first
1832
Date last
2009
Obs
70
Pa first
128
Pa last
117
P.A. Now (θ)
305.8°
Sep first
1.1
Sep last
0.3
Sep. Now (ρ)
0.32"
Mag pri
10.11
Mag sec
10.16
delta mag (ΔM)
0.05
Spectral class
G0 (yellow)
Pri motion ra
+015
Sec motion ra
Pri motion dec
-024
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
66591
HIP
88432
Tycho2
3102-00533-1
ADS
11023
BD
BD+39 3308
Distance
123.92
Distance ly
404.23
last precise pa
117.2
last precise sep
0.27
 
 
ORBITAL ELEMENTS
 
 
Period (P)525.46y± 22.316 Periastron (T)2012.872y± 42.54 Semi-major axis (a)0.6786a± 0.2007
Eccentricity (e)0.4767± 0.0339 Inclination (i)77.95°± 10.16 Longitude of periastron (ω)142.76°± 76.34
Node (Ω)131.6°± 2.84 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1953
label rho theta
2000 0.171 287.6
2001 0.181 289.5
2002 0.190 291.2
2003 0.200 292.7
2004 0.209 294.1
2005 0.219 295.4
2006 0.228 296.5
2007 0.237 297.6
2008 0.246 298.6
2009 0.254 299.5
2010 0.263 300.4
2011 0.271 301.2
2012 0.279 302.0
2013 0.287 302.7
2014 0.295 303.4
2015 0.302 304.0
2016 0.309 304.6
2017 0.316 305.2
2018 0.323 305.8
2019 0.329 306.3
2020 0.335 306.9
2021 0.341 307.4
2022 0.346 307.9
2023 0.351 308.3
2024 0.356 308.8
2025 0.361 309.2
2026 0.365 309.7
2027 0.369 310.1
2028 0.372 310.5
2029 0.375 310.9
2030 0.378 311.4

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