19487+3519 STT 387

 
 
19h 48m 43.81s +35 18' 41.3" P.A. 100.9 sep 0.46 mag 7.12,7.90 Sp F6V dist. 63.69 pc (207.76 l.y.)
 
 
Coord 2000
19487+3519
Discov num
STT 387
Comp
Coord arcsec 2000
19 48 43.81 +35 18 41.3
Date first
1843
Date last
2016
Obs
356
Pa first
118
Pa last
106
P.A. Now (θ)
100.9°
Sep first
0.5
Sep last
0.5
Sep. Now (ρ)
0.46"
Mag pri
7.12
Mag sec
7.90
delta mag (ΔM)
0.78
Spectral class
F6V (yellow-white)
Pri motion ra
+074
Sec motion ra
+074
Pri motion dec
+063
Sec motion dec
+063
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
106.4
Precise sep
0.49
Constellation
Cygnus
SAO
68893
HIP
97477
Tycho2
2677-00745-1
Gaia DR2
32947953152
HD
187458
HR
7550
ADS
12972
BD
BD+34 3727
Distance
63.69
Distance ly
207.76
last precise pa
106.4
last precise sep
0.49
 
 
ORBITAL ELEMENTS
 
 
Period (P)178.1y Periastron (T)1831.36y Semi-major axis (a)0.688a
Eccentricity (e)0.081 Inclination (i)129.4° Longitude of periastron (ω)41.2°
Node (Ω)153.2° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.616 141.1
2001 0.610 139.5
2002 0.604 137.8
2003 0.597 136.1
2004 0.590 134.4
2005 0.582 132.6
2006 0.574 130.8
2007 0.566 129.0
2008 0.557 127.1
2009 0.548 125.1
2010 0.539 123.0
2011 0.530 120.9
2012 0.521 118.7
2013 0.511 116.4
2014 0.502 114.1
2015 0.493 111.6
2016 0.484 109.1
2017 0.475 106.5
2018 0.466 103.7
2019 0.458 100.9
2020 0.450 98.0
2021 0.443 94.9
2022 0.436 91.8
2023 0.430 88.6
2024 0.425 85.3
2025 0.420 81.9
2026 0.417 78.4
2027 0.414 74.9
2028 0.412 71.4
2029 0.411 67.8
2030 0.412 64.2

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

grafico orbita





wds19487%2B3519b.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+3519 STT 387 2007 353 127 0.6 7.12 7.90 F6V NOD 194843.81+351841.3
19487+3519 STT 387 2010 360 122 0.5 7.12 7.90 F6V NOD 194843.81+351841.3
19487+3519 STT 387 2012 362 118 0.5 7.12 7.90 F6V NOD 194843.81+351841.3
19487+3519 STT 387 2013 353 114 0.5 7.12 7.90 F6V NO 194843.81+351841.3
19487+3519 STT 387 2015 355 111 0.5 7.12 7.90 F6V NO 194843.81+351841.3
19487+3519 STT 387 2016 356 106 0.5 7.12 7.90 F6V NO 194843.81+351841.3

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