20181+4044 CHR 96 Aa,Ab
20h 18m 06.99s +40° 43' 55.6" P.A. 151.00 sep 0.1 mag 6.60,6.80 Sp O9IV dist. 595.24 pc (1941.67 l.y.)
| Coord 2000 |
20181+4044 |
|
Discov num |
CHR 96 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
20 18 06.99 +40 43 55.6 |
|
| Date first |
1985 |
|
Date last |
2018 |
|
Obs |
30 |
|
| Pa first |
189 |
|
Pa last |
150.5 |
|
P.A. Now (θ) |
177.6° (calc) |
|
| Sep first |
0.0 |
|
Sep last |
0.067 |
|
Sep. Now (ρ) |
0.059" (calc) |
|
| Mag pri |
6.60 |
|
Mag sec |
6.80 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
O9IV (blue) |
|
| Pri motion ra |
+001 |
|
Sec motion ra |
|
|
| Pri motion dec |
-010 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20181+4044 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
88492 |
20 18 07 +40 43 56 |
CHR 96 Aa,Ab |
2018 |
30 |
151 |
0.1 |
6.60 |
6.80 |
0.20 |
Y |
<=== |
| Show |
HD 193322 |
49438 |
20 18 07 +40 43 56 |
STF 2666 AB |
2023 |
90 |
245 |
2.9 |
5.96 |
8.24 |
2.28 |
|
|
| Show |
|
49438 |
20 18 07 +40 43 56 |
STF 2666 AC |
2006 |
13 |
207 |
34.0 |
5.96 |
10.70 |
4.74 |
|
|
| Show |
|
49438 |
20 18 07 +40 43 56 |
TAR 5 AD |
2006 |
8 |
181 |
49.6 |
5.96 |
11.00 |
5.04 |
|
|
| Show |
|
49438 |
20 18 06 +40 43 25 |
STF 2666 CD |
2018 |
13 |
142 |
24.1 |
10.70 |
11.00 |
0.30 |
|
|
Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
88492 |
|
HIP |
100069 |
|
Tycho2 |
3155-02321-1 |
|
| Gaia DR2 |
2062360626011542272 |
|
HD |
193322 |
|
HR |
7767 |
|
ADS |
13672 |
|
| BD |
BD+40 4103 |
|
Distance |
595.24 |
|
Distance ly |
1941.67 |
|
ORBITAL ELEMENTS
| Period (P) | 44.1y | ± 1 |
Periastron (T) | 1995.3y | ± 1.2 |
Semi-major axis (a) | 52.4m | ± 2.5 |
| Eccentricity (e) | 0.58 | ± 0.04 |
Inclination (i) | 37.4° | ± 6 |
Longitude of periastron (ω) | 253.3° | ± 9.2 |
| Node (Ω) | 77.2° | ± 14.4 |
Notes | n | |
Reference | MzA2019b | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
77.2 |
0.042 |
| 2001 |
84.7 |
0.046 |
| 2002 |
90.9 |
0.050 |
| 2003 |
96.2 |
0.054 |
| 2004 |
100.9 |
0.057 |
| 2005 |
105.2 |
0.059 |
| 2006 |
109.2 |
0.061 |
| 2007 |
113.0 |
0.063 |
| 2008 |
116.5 |
0.065 |
| 2009 |
120.0 |
0.066 |
| 2010 |
123.3 |
0.067 |
| 2011 |
126.5 |
0.067 |
| 2012 |
129.7 |
0.068 |
| 2013 |
132.8 |
0.068 |
| 2014 |
136.0 |
0.068 |
| 2015 |
139.1 |
0.068 |
| 2016 |
142.2 |
0.068 |
| 2017 |
145.4 |
0.067 |
| 2018 |
148.6 |
0.067 |
| 2019 |
151.9 |
0.066 |
| 2020 |
155.2 |
0.066 |
| 2021 |
158.6 |
0.065 |
| 2022 |
162.1 |
0.064 |
| 2023 |
165.8 |
0.063 |
| 2024 |
169.5 |
0.061 |
| 2025 |
173.5 |
0.060 |
| 2026 |
177.6 |
0.059 |
| 2027 |
181.9 |
0.057 |
| 2028 |
186.5 |
0.055 |
| 2029 |
191.4 |
0.054 |
| 2030 |
196.7 |
0.052 |
| 2031 |
202.4 |
0.049 |
| 2032 |
208.6 |
0.047 |
| 2033 |
215.5 |
0.045 |
| 2034 |
223.3 |
0.042 |
| 2035 |
232.4 |
0.038 |
| 2036 |
243.4 |
0.034 |
| 2037 |
257.5 |
0.030 |
| 2038 |
277.6 |
0.024 |
| 2039 |
309.4 |
0.019 |
| 2040 |
354.1 |
0.018 |
| 2041 |
30.8 |
0.023 |
| 2042 |
52.7 |
0.029 |
| 2043 |
66.6 |
0.036 |
| 2044 |
76.4 |
0.041 |
| 2045 |
84.0 |
0.046 |
| 2046 |
90.3 |
0.050 |
| 2047 |
95.7 |
0.054 |
| 2048 |
100.5 |
0.057 |
| 2049 |
104.8 |
0.059 |
| 2050 |
108.8 |
0.061 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
