16416+1513 USN   2

 
 
16h 41m 36.62s +15 12' 37.0" P.A. 276.6 sep 0.13 mag 16.40,16.40 Sp DA+DA
 
 
Coord 2000
16416+1513
Discov num
USN   2
Comp
Coord arcsec 2000
16 41 36.62 +15 12 37.0
Date first
2008
Date last
2010
Obs
3
Pa first
276
Pa last
88
P.A. Now (θ)
276.6°
Sep first
0.0
Sep last
0.1
Sep. Now (ρ)
0.13"
Mag pri
16.40
Mag sec
16.40
delta mag (ΔM)
0
Spectral class
DA+DA
Pri motion ra
+020
Sec motion ra
Pri motion dec
-673
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
last precise pa
88.3
last precise sep
0.124
 
 
ORBITAL ELEMENTS
 
 
Period (P)4.03y± 0.018 Periastron (T)2008.54y± 0.03 Semi-major axis (a)98.76m± 5.65
Eccentricity (e)0.74± 0.032 Inclination (i)83.2°± 0.3 Longitude of periastron (ω)49.4°± 1.6
Node (Ω)91.6°± 0.3 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2012
label rho theta
2000 0.014 38.4
2001 0.097 272.4
2002 0.128 277.1
2003 0.084 283.1
2004 0.012 26.0
2005 0.093 272.1
2006 0.128 277.0
2007 0.087 282.8
2008 0.012 12.0
2009 0.090 271.9
2010 0.129 276.9
2011 0.088 282.5
2012 0.012 357.6
2013 0.086 271.6
2014 0.129 276.8
2015 0.090 282.2
2016 0.013 344.5
2017 0.082 271.3
2018 0.129 276.6
2019 0.092 282.0
2020 0.015 333.6
2021 0.078 271.0
2022 0.130 276.5
2023 0.094 281.8
2024 0.016 325.0
2025 0.073 270.6
2026 0.130 276.4
2027 0.096 281.5
2028 0.019 318.2
2029 0.068 270.2
2030 0.130 276.3

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

grafico orbita





grafico misure orbit6
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
16416+1513 USN 2 2010 3 88 0.1 16.40 16.40 DA DA NO 164136.62+151237.0

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