17349+1234 MCY   4 (Alp Oph)

 
 
17H 34M 56.06S +12 33' 36.1" P.A. 238.7 SEP 0.75 MAG 2.10,5.00 SP A5III DIST. 14.9 PC (48.6 L.Y.)
 
 
Coord 2000
17349+1234
Discov num
MCY   4
Comp
Coord arcsec 2000
17 34 56.06 +12 33 36.1
Date first
1982
Date last
2015
Obs
15
Pa first
243
Pa last
246
P.A. Now (θ)
238.7°
Sep first
0.8
Sep last
0.8
Sep. Now (ρ)
0.75"
Mag pri
2.10
Mag sec
5.00
delta mag (ΔM)
2.9
Spectral class
A5III (white)
Pri motion ra
+110
Sec motion ra
Pri motion dec
-223
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Alp Oph
Constellation
Ophiuchus
SAO
102932
HIP
86032
HD
159561
HR
6556
GC
23837
GL
Gl 681
BD
BD+12 3252
Bayer
Alpha Ophiuchi
Bayer name
Alp Oph
Flamsteed
55 Ophiuchi
Flamsteed name
55 Oph
Distance
14.9
Distance ly
48.6
last precise pa
246
last precise sep
0.753
 
 
ORBITAL ELEMENTS
 
 
Period (P)3148.4d (8.619999999999999y) Periastron (T)52888d (2003.678y)± 53 Semi-major axis (a)0.427a± 0.017
Eccentricity (e)0.92± 0.03 Inclination (i)125°± 8 Longitude of periastron (ω)162°± 14
Node (Ω)232°± 9 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000-01-01 0.790 240.8
2001-01-01 0.734 237.9
2002-01-01 0.605 234.2
2003-01-01 0.357 226.7
2004-01-01 0.158 274.8
2005-01-01 0.470 254.3
2006-01-01 0.649 248.8
2007-01-01 0.752 245.4
2008-01-01 0.793 242.5
2009-01-01 0.776 239.8
2010-01-01 0.695 236.7
2011-01-01 0.529 232.1
2012-01-01 0.197 217.8
2013-01-01 0.301 261.6
2014-01-01 0.549 251.8
2015-01-01 0.696 247.4
2016-01-01 0.775 244.2
2017-01-01 0.794 241.5
2018-01-01 0.753 238.7
2019-01-01 0.644 235.2
2020-01-01 0.433 229.3
2021-01-01 0.048 330.3
2022-01-01 0.412 256.4
2023-01-01 0.614 249.8
2024-01-01 0.733 246.1
2025-01-01 0.789 243.2
2026-01-01 0.786 240.5
2027-01-01 0.721 237.5
2028-01-01 0.579 233.5
2029-01-01 0.306 224.5
2030-01-01 0.216 267.8

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