18197+1016 HU 197 (HD 168499)
18h 19m 40.18s +10° 16' 19.2" P.A. 53.00 sep 0.5 mag 8.73,9.77 Sp G0 dist. 57.47 pc (187.47 l.y.)
Coord 2000 |
18197+1016 |
|
Discov num |
HU 197 |
|
Comp |
|
|
Coord arcsec 2000 |
18 19 40.18 +10 16 19.2 |
|
Date first |
1900 |
|
Date last |
2018 |
|
Obs |
85 |
|
Pa first |
28 |
|
Pa last |
52.5 |
|
P.A. Now (θ) |
48° |
|
Sep first |
0.4 |
|
Sep last |
0.485 |
|
Sep. Now (ρ) |
0.486" |
|
Mag pri |
8.73 |
|
Mag sec |
9.77 |
|
delta mag (ΔM) |
1.04 |
|
Spectral class |
G0 (yellow) |
|
Pri motion ra |
-098 |
|
Sec motion ra |
|
|
Pri motion dec |
-208 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 168499 |
|
Constellation |
Ophiuchus |
|
SAO |
103612 |
|
HIP |
89806 |
|
Tycho2 |
1014-02144-1 |
|
HD |
168499 |
|
GC |
25009 |
|
ADS |
11260 |
|
BD |
BD+10 3473 |
|
Distance |
57.47 |
|
Distance ly |
187.47 |
|
ORBITAL ELEMENTS
Period (P) | 135.4y | |
Periastron (T) | 1930.8y | |
Semi-major axis (a) | 0.487a | |
Eccentricity (e) | 0.057 | |
Inclination (i) | 125.7° | |
Longitude of periastron (ω) | 317.5° | |
Node (Ω) | 238.02° | |
Notes | n | |
Reference | Hrt2010a | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
83.3 |
0.443 |
2001 |
81.4 |
0.450 |
2002 |
79.6 |
0.458 |
2003 |
77.9 |
0.465 |
2004 |
76.2 |
0.471 |
2005 |
74.6 |
0.477 |
2006 |
73.0 |
0.483 |
2007 |
71.4 |
0.488 |
2008 |
69.9 |
0.492 |
2009 |
68.4 |
0.496 |
2010 |
66.9 |
0.500 |
2011 |
65.5 |
0.503 |
2012 |
64.0 |
0.505 |
2013 |
62.6 |
0.506 |
2014 |
61.2 |
0.507 |
2015 |
59.7 |
0.507 |
2016 |
58.3 |
0.507 |
2017 |
56.9 |
0.506 |
2018 |
55.4 |
0.504 |
2019 |
54.0 |
0.502 |
2020 |
52.5 |
0.499 |
2021 |
51.0 |
0.495 |
2022 |
49.5 |
0.491 |
2023 |
48.0 |
0.486 |
2024 |
46.4 |
0.480 |
2025 |
44.8 |
0.474 |
2026 |
43.1 |
0.467 |
2027 |
41.4 |
0.460 |
2028 |
39.7 |
0.452 |
2029 |
37.8 |
0.444 |
2030 |
35.9 |
0.436 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|