19520-1021 BU  148AB

 
 
19h 52m 01.89s -10 21' 13.5" P.A. 217 sep 0.56 mag 7.74,8.41 Sp F2 dist. 86.96 pc (283.66 l.y.)
 
 
Coord 2000
19520-1021
Discov num
BU  148
Comp
AB
Coord arcsec 2000
19 52 01.89 -10 21 13.5
Date first
1873
Date last
2017
Obs
71
Pa first
310
Pa last
223
P.A. Now (θ)
217°
Sep first
1.0
Sep last
0.6
Sep. Now (ρ)
0.56"
Mag pri
7.74
Mag sec
8.41
delta mag (ΔM)
0.67
Spectral class
F2 (yellow-white)
Pri motion ra
-014
Sec motion ra
-014
Pri motion dec
-049
Sec motion dec
-049
Notes
O (Orbital solution)
This double is physical.
 
 
19520-1021 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 19520-1021 BU 148 AB 1873 2017 71 217 0.6 7.74 8.41 0.67 Y <===
Show 19520-1021 BU 148 AC 1891 2000 8 57 30.4 7.74 13.30 5.56
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
222.6
Precise sep
0.619
Constellation
Aquila
HIP
97766
Tycho2
5729-01628-1
HD
187774
ADS
13028
Distance
86.96
Distance ly
283.66
last precise pa
222.6
last precise sep
0.619
 
 
ORBITAL ELEMENTS
 
 
Period (P)783.31y Periastron (T)2032.84y Semi-major axis (a)1.365a
Eccentricity (e)0.62 Inclination (i)120.5° Longitude of periastron (ω)217.5°
Node (Ω)38.1° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2002
label rho theta
2000 0.613 234.5
2001 0.612 233.6
2002 0.611 232.7
2003 0.609 231.8
2004 0.607 230.9
2005 0.605 229.9
2006 0.603 229.0
2007 0.601 228.1
2008 0.598 227.1
2009 0.596 226.1
2010 0.593 225.2
2011 0.589 224.2
2012 0.586 223.2
2013 0.582 222.2
2014 0.577 221.2
2015 0.573 220.2
2016 0.568 219.1
2017 0.563 218.1
2018 0.558 217.0
2019 0.552 215.9
2020 0.546 214.7
2021 0.539 213.6
2022 0.533 212.4
2023 0.526 211.2
2024 0.518 209.9
2025 0.511 208.6
2026 0.503 207.3
2027 0.494 205.9
2028 0.486 204.5
2029 0.477 203.0
2030 0.468 201.5

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

grafico orbita





wds19520-1021a.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
19520-1021 BU 148 AB 2004 85 231 0.6 7.74 8.41 F2 NOD 195201.89-102113.5
19520-1021 BU 148 AB 2008 86 229 0.6 7.74 8.41 F2 NOD 195201.89-102113.5
19520-1021 BU 148 AB 2009 87 228 0.6 7.74 8.41 F2 NOD 195201.89-102113.5
19520-1021 BU 148 AB 2017 71 223 0.6 7.74 8.41 F2 O 195201.89-102113.5

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