16518+2840 STF2107AB

 
 
16h 51m 50.10s +28 39' 58.7" P.A. 106.5 sep 1.39 mag 6.90,8.50 Sp F5IV dist. 58.41 pc (190.53 l.y.)
 
 
Coord 2000
16518+2840
Discov num
STF2107
Comp
AB
Coord arcsec 2000
16 51 50.10 +28 39 58.7
Date first
1828
Date last
2016
Obs
437
Pa first
149
Pa last
105
P.A. Now (θ)
106.5°
Sep first
1.1
Sep last
1.4
Sep. Now (ρ)
1.39"
Mag pri
6.90
Mag sec
8.50
delta mag (ΔM)
1.6
Spectral class
F5IV (yellow-white)
Pri motion ra
-001
Sec motion ra
-006
Pri motion dec
+038
Sec motion dec
+036
Notes
N O (See Notes, Orbital solution)
rPM=0.142 (< 0.3, Physical double)
This double is physical.
 
 
16518+2840 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 84655 16518+2840 STF2107 AB 1828 2016 437 106 1.4 6.90 8.50 1.60 Y <===
Show 84655 16518+2840 STF2107 AC 1901 2002 7 309 82.6 6.90 11.51 4.61
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
104.9
Precise sep
1.436
Constellation
Hercules
SAO
84655
HIP
82510
Tycho2
2070-00684-1
HD
152380
ADS
10235
BD
BD+28 2624
Distance
58.41
Distance ly
190.53
last precise pa
104.9
last precise sep
1.436
 
 
ORBITAL ELEMENTS
 
 
Period (P)268.35y Periastron (T)1895.66y Semi-major axis (a)0.992a
Eccentricity (e)0.57 Inclination (i)28.6° Longitude of periastron (ω)251.2°
Node (Ω)43.5° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2001
label rho theta
2000 1.373 97.6
2001 1.375 98.1
2002 1.377 98.6
2003 1.379 99.1
2004 1.381 99.6
2005 1.382 100.1
2006 1.384 100.6
2007 1.385 101.1
2008 1.386 101.6
2009 1.387 102.1
2010 1.388 102.6
2011 1.389 103.0
2012 1.390 103.5
2013 1.391 104.0
2014 1.391 104.5
2015 1.392 105.0
2016 1.392 105.5
2017 1.393 106.0
2018 1.393 106.5
2019 1.393 107.0
2020 1.393 107.5
2021 1.393 108.0
2022 1.393 108.5
2023 1.393 108.9
2024 1.392 109.4
2025 1.392 109.9
2026 1.391 110.4
2027 1.391 110.9
2028 1.390 111.4
2029 1.389 111.9
2030 1.388 112.4

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

grafico orbita





wds16518%2B2840a.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
16518+2840 STF2107 AB 2007 428 101 1.4 6.90 8.50 F5IV NOD 165150.10+283958.7
16518+2840 STF2107 AB 2010 433 102 1.4 6.90 8.50 F5IV NOD 165150.10+283958.7
16518+2840 STF2107 AB 2012 443 109 1.8 6.90 8.50 F5IV NOD 165150.10+283958.7
16518+2840 STF2107 AB 2013 431 103 1.4 6.90 8.50 F5IV NOD 165150.10+283958.7
16518+2840 STF2107 AB 2015 432 104 1.4 6.90 8.50 F5IV NO 165150.10+283958.7
16518+2840 STF2107 AB 2016 437 105 1.4 6.90 8.50 F5IV NO 165150.10+283958.7

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