18488-1836 KUI 88 (HD 173928)
18h 48m 45.41s -18° 36' 04.2" P.A. 153.00 sep 0.5 mag 6.87,8.14 Sp A1+K0 dist. 312.5 pc (1019.38 l.y.)
| Coord 2000 |
18488-1836 |
|
Discov num |
KUI 88 |
|
Comp |
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Coord arcsec 2000 |
18 48 45.41 -18 36 04.2 |
|
| Date first |
1933 |
|
Date last |
2018 |
|
Obs |
42 |
|
| Pa first |
195 |
|
Pa last |
152.9 |
|
P.A. Now (θ) |
152.9° |
|
| Sep first |
0.3 |
|
Sep last |
0.498 |
|
Sep. Now (ρ) |
0.498" |
|
| Mag pri |
6.87 |
|
Mag sec |
8.14 |
|
delta mag (ΔM) |
1.27 |
|
Spectral class |
A1+K0 (white/yellow-orange) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
+003 |
|
| Pri motion dec |
-002 |
|
Sec motion dec |
-002 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 173928 |
|
Constellation |
Sagittarius |
|
SAO |
161848 |
|
HIP |
92301 |
|
| Tycho2 |
6285-00193-1 |
|
Gaia DR2 |
4098425954745263104 |
|
HD |
173928 |
|
HR |
7072 |
|
| GC |
25761 |
|
BD |
BD-18 5079 |
|
Distance |
312.5 |
|
Distance ly |
1019.38 |
|
ORBITAL ELEMENTS
| Period (P) | 909.7y | |
Periastron (T) | 1865y | |
Semi-major axis (a) | 0.598a | |
| Eccentricity (e) | 0.341 | |
Inclination (i) | 124° | |
Longitude of periastron (ω) | 232° | |
| Node (Ω) | 137.8° | |
Notes | | |
Reference | Hrt2013c | |
| Equinox | 2000 | |
Last observation | 2003 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
159.9 |
0.467 |
| 2001 |
159.5 |
0.470 |
| 2002 |
159.2 |
0.473 |
| 2003 |
158.9 |
0.476 |
| 2004 |
158.5 |
0.479 |
| 2005 |
158.2 |
0.482 |
| 2006 |
157.9 |
0.485 |
| 2007 |
157.6 |
0.488 |
| 2008 |
157.3 |
0.490 |
| 2009 |
157.0 |
0.493 |
| 2010 |
156.7 |
0.496 |
| 2011 |
156.4 |
0.499 |
| 2012 |
156.1 |
0.501 |
| 2013 |
155.8 |
0.504 |
| 2014 |
155.5 |
0.507 |
| 2015 |
155.2 |
0.510 |
| 2016 |
154.9 |
0.512 |
| 2017 |
154.6 |
0.515 |
| 2018 |
154.3 |
0.518 |
| 2019 |
154.1 |
0.520 |
| 2020 |
153.8 |
0.523 |
| 2021 |
153.5 |
0.525 |
| 2022 |
153.3 |
0.528 |
| 2023 |
153.0 |
0.531 |
| 2024 |
152.7 |
0.533 |
| 2025 |
152.5 |
0.536 |
| 2026 |
152.2 |
0.538 |
| 2027 |
152.0 |
0.541 |
| 2028 |
151.7 |
0.543 |
| 2029 |
151.4 |
0.545 |
| 2030 |
151.2 |
0.548 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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