19487+1504 A 1658 (HD 187283)
19h 48m 39.64s +15° 03' 32.4" P.A. 54.00 sep 0.2 mag 8.30,8.74 Sp F5V dist. 136.61 pc (445.62 l.y.)
Coord 2000 |
19487+1504 |
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Discov num |
A 1658 |
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Comp |
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Coord arcsec 2000 |
19 48 39.64 +15 03 32.4 |
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Date first |
1907 |
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Date last |
2021 |
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Obs |
84 |
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Pa first |
161 |
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Pa last |
54.1 |
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P.A. Now (θ) |
47.7° |
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Sep first |
0.2 |
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Sep last |
0.233 |
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Sep. Now (ρ) |
0.237" |
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Mag pri |
8.30 |
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Mag sec |
8.74 |
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delta mag (ΔM) |
0.44 |
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Spectral class |
F5V (yellow-white) |
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Pri motion ra |
+044 |
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Sec motion ra |
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Pri motion dec |
+012 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 187283 |
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Constellation |
Aquila |
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SAO |
105284 |
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HIP |
97469 |
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Tycho2 |
1615-00730-1 |
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Gaia DR2 |
4317733994259738752 |
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HD |
187283 |
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ADS |
12961 |
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BD |
BD+14 4048 |
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Distance |
136.61 |
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Distance ly |
445.62 |
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ORBITAL ELEMENTS
Period (P) | 88.1y | ± 1.3 |
Periastron (T) | 1991.6y | ± 1.2 |
Semi-major axis (a) | 0.224a | ± 0.001 |
Eccentricity (e) | 0.087 | ± 0.004 |
Inclination (i) | 169.8° | ± 5 |
Longitude of periastron (ω) | 228.2° | ± 35 |
Node (Ω) | 51.5° | ± 40 |
Notes | n | |
Reference | Doc2009g | |
Equinox | 2000 | |
Last observation | 2000 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
142.8 |
0.205 |
2001 |
138.1 |
0.206 |
2002 |
133.4 |
0.207 |
2003 |
128.7 |
0.208 |
2004 |
124.1 |
0.210 |
2005 |
119.6 |
0.211 |
2006 |
115.1 |
0.213 |
2007 |
110.7 |
0.214 |
2008 |
106.3 |
0.216 |
2009 |
102.0 |
0.217 |
2010 |
97.8 |
0.219 |
2011 |
93.6 |
0.220 |
2012 |
89.5 |
0.222 |
2013 |
85.5 |
0.224 |
2014 |
81.5 |
0.225 |
2015 |
77.5 |
0.227 |
2016 |
73.7 |
0.228 |
2017 |
69.8 |
0.230 |
2018 |
66.1 |
0.231 |
2019 |
62.3 |
0.233 |
2020 |
58.6 |
0.234 |
2021 |
55.0 |
0.235 |
2022 |
51.3 |
0.236 |
2023 |
47.7 |
0.237 |
2024 |
44.2 |
0.238 |
2025 |
40.6 |
0.239 |
2026 |
37.1 |
0.239 |
2027 |
33.6 |
0.240 |
2028 |
30.1 |
0.241 |
2029 |
26.7 |
0.241 |
2030 |
23.2 |
0.241 |
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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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