20181+4044 CHR  96Aa,Ab

 
 
20h 18m 06.99s +40 43' 55.6" P.A. 177.8 sep 0.05 mag 6.60,6.80 Sp O9V:((n)) 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
2010
Obs
25
Pa first
189
Pa last
130
P.A. Now (θ)
177.8°
Sep first
0.0
Sep last
0.1
Sep. Now (ρ)
0.05"
Mag pri
6.60
Mag sec
6.80
delta mag (ΔM)
0.2
Spectral class
O9V:((n)) (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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49438 20181+4044 CHR 96 Aa,Ab 1985 2010 25 178 0.0 6.60 6.80 0.20 Y <===
Show 20181+4044 STF2666 AB 1831 2013 81 246 2.7 5.96 8.24 2.28
Show 20181+4044 STF2666 AC 1887 2006 13 207 34.0 5.96 10.70 4.74
Show 20181+4044 TAR 5 AD 1887 2006 8 181 49.6 5.96 11.00 5.04
Show 20181+4044 STF2666 CD 1892 2018 9 143 24.1 10.70 11.00 0.30
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
129.8
Precise sep
0.065
Constellation
Cygnus
SAO
49438
HIP
100069
Tycho2
3155-02321-1
Gaia DR2
26011542272
HD
193322
HR
7767
ADS
13672
BD
BD+40 4103
Distance
595.24
Distance ly
1941.67
last precise pa
129.8
last precise sep
0.065
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)35.2y± 1.45 Periastron (T)1994.84y± 1.69 Semi-major axis (a)54.5m± 3.7
Eccentricity (e)0.489± 0.081 Inclination (i)46.2°± 6.9 Longitude of periastron (ω)70.4°± 7.5
Node (Ω)255.2°± 15 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.050 75.8
2001 0.054 82.5
2002 0.058 88.3
2003 0.060 93.6
2004 0.062 98.5
2005 0.063 103.1
2006 0.064 107.7
2007 0.064 112.2
2008 0.064 116.7
2009 0.063 121.3
2010 0.062 125.9
2011 0.061 130.7
2012 0.060 135.7
2013 0.059 140.9
2014 0.057 146.3
2015 0.056 152.0
2016 0.055 158.0
2017 0.053 164.3
2018 0.052 170.9
2019 0.051 177.8
2020 0.050 185.0
2021 0.049 192.5
2022 0.048 200.3
2023 0.047 208.4
2024 0.046 217.0
2025 0.044 226.1
2026 0.042 236.0
2027 0.038 247.4
2028 0.033 261.6
2029 0.027 282.1
2030 0.021 316.2

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






wds20181%2B4044b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)312.4d Periastron (T)50123.5d (1996.109y) Semi-major axis (a)3.9m± 1.2
Eccentricity (e)0 Inclination (i)51°± 34 Longitude of periastron (ω)180°
Node (Ω)25°± 19 Note Grade8(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000-01-01 0.004 36.4
2001-01-01 0.003 97.2
2002-01-01 0.003 176.7
2003-01-01 0.004 218.2
2004-01-01 0.002 281.3
2005-01-01 0.003 359.0
2006-01-01 0.004 40.0
2007-01-01 0.002 105.4
2008-01-01 0.003 181.1
2009-01-01 0.004 221.9
2010-01-01 0.002 289.7
2011-01-01 0.004 3.2
2012-01-01 0.004 43.8
2013-01-01 0.002 113.9
2014-01-01 0.004 185.2
2015-01-01 0.004 225.8
2016-01-01 0.002 298.2
2017-01-01 0.004 7.1
2018-01-01 0.004 47.8
2019-01-01 0.002 122.4
2020-01-01 0.004 189.0
2021-01-01 0.003 229.9
2022-01-01 0.002 306.6
2023-01-01 0.004 10.9
2024-01-01 0.003 52.1
2025-01-01 0.003 130.7
2026-01-01 0.004 192.7
2027-01-01 0.003 234.4
2028-01-01 0.003 314.7
2029-01-01 0.004 14.5
2030-01-01 0.003 56.7

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






wds20181%2B4044c.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
20181+4044 CHR 96 Aa,Ab 2008 8 117 0.1 5.80   O9V NO 201806.99+404355.6
20181+4044 CHR 96 Aa,Ab 2010 24 130 0.1 5.80   O9V:((n)) NOD 201806.99+404355.6

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