17572+2400 MCA  50

 
 
17h 57m 14.34s +23 59' 44.6" P.A. 161 sep 0.1 mag 6.30,7.90 Sp G2V+K2V dist. 28.25 pc (92.15 l.y.)
 
 
Coord 2000
17572+2400
Discov num
MCA  50
Comp
Coord arcsec 2000
17 57 14.34 +23 59 44.6
Date first
1976
Date last
2007
Obs
28
Pa first
160
Pa last
161
P.A. Now (θ)
161°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.1"
Mag pri
6.30
Mag sec
7.90
delta mag (ΔM)
1.6
Spectral class
G2V+K2V (yellow/yellow-orange)
Pri motion ra
-013
Sec motion ra
Pri motion dec
+071
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
161.1
Precise sep
0.09
Constellation
Hercules
SAO
85575
HIP
87895
Tycho2
2090-04674-1
HD
163840
HR
6697
GL
NN 4039A
BD
BD+24 3283
Distance
28.25
Distance ly
92.15
last precise pa
161.1
last precise sep
0.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)881.628d (2.41y)± 0.064 Periastron (T)55650.39d (2011.241y)± 0.38 Semi-major axis (a)80.64m
Eccentricity (e)0.4165± 0.001 Inclination (i)72.83°± 0.47 Longitude of periastron (ω)135.46°± 0.16
Node (Ω)175.32°± 0.44 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000-01-01 0.045 134.0
2001-01-01 0.092 176.5
2002-01-01 0.038 28.9
2003-01-01 0.098 165.5
2004-01-01 0.035 339.2
2005-01-01 0.065 149.4
2006-01-01 0.071 183.2
2007-01-01 0.028 75.3
2008-01-01 0.101 170.0
2009-01-01 0.053 0.4
2010-01-01 0.082 157.8
2011-01-01 0.037 199.4
2012-01-01 0.037 123.3
2013-01-01 0.097 174.5
2014-01-01 0.045 18.3
2015-01-01 0.095 163.6
2016-01-01 0.021 314.2
2017-01-01 0.057 144.5
2018-01-01 0.081 180.1
2019-01-01 0.030 52.9
2020-01-01 0.101 168.2
2021-01-01 0.050 353.8
2022-01-01 0.075 154.9
2023-01-01 0.052 190.3
2024-01-01 0.031 107.8
2025-01-01 0.100 172.6
2026-01-01 0.050 10.2
2027-01-01 0.090 161.5
2028-01-01 0.016 248.1
2029-01-01 0.049 138.0
2030-01-01 0.089 177.6

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

grafico orbita





wds17572%2B2400b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17572+2400 MCA 50 2003 22 180 0.1 6.30 7.90 G2V+K2V NOD 175714.34+235944.6
17572+2400 MCA 50 2007 23 157 0.1 6.30 7.90 G2V+K2V NOD 175714.34+235944.6

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