19487+1504 A  1658

 
 
19h 48m 39.64s +15 03' 32.4" P.A. 66.1 sep 0.23 mag 8.30,8.74 Sp F5V dist. 136.61 pc (445.62 l.y.)
 
 
Coord 2000
19487+1504
Discov num
A  1658
Comp
Coord arcsec 2000
19 48 39.64 +15 03 32.4
Date first
1907
Date last
2015
Obs
81
Pa first
161
Pa last
78
P.A. Now (θ)
66.1°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.23"
Mag pri
8.30
Mag sec
8.74
delta mag (ΔM)
0.44
Spectral class
F5V (yellow-white)
Pri motion ra
+044
Sec motion ra
Pri motion dec
+012
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
78.2
Precise sep
0.226
Cdsa2 id
A 1658
Constellation
Aquila
HIP
97469
HD
187283
ADS
12961
Ra deg
19.81101111111111
De deg
15.059000000000001
Distance
136.61
Distance ly
445.62
last precise pa
78.2
last precise sep
0.226
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2000
label rho theta
2000 0.205 142.8
2001 0.206 138.1
2002 0.207 133.4
2003 0.208 128.7
2004 0.210 124.1
2005 0.211 119.6
2006 0.213 115.1
2007 0.214 110.7
2008 0.216 106.3
2009 0.217 102.0
2010 0.219 97.8
2011 0.220 93.6
2012 0.222 89.5
2013 0.224 85.5
2014 0.225 81.5
2015 0.227 77.5
2016 0.228 73.7
2017 0.230 69.8
2018 0.231 66.1
2019 0.233 62.3
2020 0.234 58.6
2021 0.235 55.0
2022 0.236 51.3
2023 0.237 47.7
2024 0.238 44.2
2025 0.239 40.6
2026 0.239 37.1
2027 0.240 33.6
2028 0.241 30.1
2029 0.241 26.7
2030 0.241 23.2

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

grafico orbita





wds19487%2B1504b.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
19487+1504 A 1658 2000 78 145 0.2 8.30 8.74 F5V NO 194839.64+150332.4
19487+1504 A 1658 2006 79 115 0.2 8.30 8.74 F5V NO 194839.64+150332.4
19487+1504 A 1658 2007 82 112 0.2 8.30 8.74 F5V NO 194839.64+150332.4
19487+1504 A 1658 2015 81 78 0.2 8.30 8.74 F5V NO 194839.64+150332.4

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