20383-0106 BU  672 (71 Aql)

 
 
20h 38m 20.27s -01 06' 18.3" P.A. 285.00 sep 35.8 mag 4.41,12.00 Sp G8III dist. 103.41 pc (337.32 l.y.)
 
 
Coord 2000
20383-0106
Discov num
BU  672
Comp
Coord arcsec 2000
20 38 20.27 -01 06 18.3
Date first
1878
Date last
2013
Obs
11
Pa first
281
Pa last
285
P.A. Now (θ)
285°
Sep first
30.5
Sep last
35.8
Sep. Now (ρ)
35.8"
Mag pri
4.41
Mag sec
12.00
delta mag (ΔM)
7.59
Spectral class
G8III (yellow)
Pri motion ra
+015
Sec motion ra
-017
Pri motion dec
-017
Sec motion dec
+006
Notes
N (See Notes)
rPM=1.738
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
285.3
Precise sep
35.84
Name
71 Aql
Other name
l Aql
Constellation
Aquila
SAO
144649
HIP
101847
Tycho2
5177-01878-1
Gaia DR2
30911097472
HD
196574
HR
7884
GC
28725
ADS
14081
BD
BD-01 4016
Flamsteed
71 Aquilae
Flamsteed name
71 Aql
Distance
103.41
Distance ly
337.32
last precise pa
285.3
last precise sep
35.84
 
 
ORBITAL ELEMENTS
 
 
Period (P)205.2d Periastron (T)23358d (1922.828y) Semi-major axis (a)3.82m± 0.81
Eccentricity (e)0 Inclination (i)147.7°± 5.9 Longitude of periastron (ω)
Node (Ω)314°± 1.3 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation1992
label rho theta
2000-01-01 0.003 179.3
2001-01-01 0.003 268.1
2002-01-01 0.004 338.7
2003-01-01 0.003 64.7
2004-01-01 0.004 139.9
2005-01-01 0.003 219.5
2006-01-01 0.004 301.6
2007-01-01 0.003 14.7
2008-01-01 0.004 102.3
2009-01-01 0.004 172.3
2010-01-01 0.003 260.8
2011-01-01 0.004 332.4
2012-01-01 0.003 56.6
2013-01-01 0.004 134.0
2014-01-01 0.003 211.3
2015-01-01 0.004 295.5
2016-01-01 0.003 7.1
2017-01-01 0.004 95.6
2018-01-01 0.004 165.6
2019-01-01 0.003 253.2
2020-01-01 0.004 326.4
2021-01-01 0.003 48.4
2022-01-01 0.004 128.1
2023-01-01 0.003 203.2
2024-01-01 0.004 289.3
2025-01-01 0.003 359.9
2026-01-01 0.003 88.7
2027-01-01 0.004 159.2
2028-01-01 0.003 245.4
2029-01-01 0.004 320.4
2030-01-01 0.003 40.2

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






wds20383-0106r.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
20383-0106 BU 672 1998 9 284 35.5 4.32 11.00 G8III N D 203820.27-010618.3
20383-0106 BU 672 2000 10 283 35.2 4.32 11.00 G8III N D 203820.27-010618.3
20383-0106 BU 672 2013 11 285 35.8 4.32 11.00 G8III N 203820.27-010618.3

If you need more information about this double, apply for a data request form to the WDS.