15427+2618 STF1967 (Gam CrB)

 
 
15h 42m 44.57s +26 17' 44.3" P.A. 108.1 sep 0.36 mag 4.04,5.60 Sp B9V+A3V dist. 44.78 pc (146.07 l.y.)
 
 
Coord 2000
15427+2618
Discov num
STF1967
Comp
Coord arcsec 2000
15 42 44.57 +26 17 44.3
Date first
1826
Date last
2012
Obs
488
Pa first
111
Pa last
111
P.A. Now (θ)
108.1°
Sep first
0.7
Sep last
0.6
Sep. Now (ρ)
0.36"
Mag pri
4.04
Mag sec
5.60
delta mag (ΔM)
1.56
Spectral class
B9V+A3V (blue-white/white)
Pri motion ra
-107
Sec motion ra
-107
Pri motion dec
+048
Sec motion dec
+048
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
111.3
Precise sep
0.575
Name
Gam CrB
Constellation
Corona Borealis
SAO
83958
HIP
76952
Tycho2
2036-01674-1
HD
140436
HR
5849
GC
21130
ADS
9757
BD
BD+26 2722
Bayer
Gamma Coronae Borealis
Bayer name
Gam CrB
Flamsteed
8 Coronae Borealis
Flamsteed name
8 CrB
Distance
44.78
Distance ly
146.07
last precise pa
111.3
last precise sep
0.575
 
 
ORBITAL ELEMENTS
 
 
Period (P)91.2y± 0.4 Periastron (T)1931.6y± 0.3 Semi-major axis (a)0.729a± 0.006
Eccentricity (e)0.48± 0.01 Inclination (i)94.45°± 0.07 Longitude of periastron (ω)103.8°± 0.6
Node (Ω)111.75°± 0.09 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation2011
label rho theta
2000 0.721 114.8
2001 0.726 114.6
2002 0.728 114.3
2003 0.729 114.0
2004 0.727 113.8
2005 0.722 113.5
2006 0.715 113.2
2007 0.704 112.9
2008 0.690 112.6
2009 0.673 112.3
2010 0.651 112.0
2011 0.626 111.6
2012 0.595 111.3
2013 0.560 110.8
2014 0.519 110.3
2015 0.472 109.8
2016 0.419 109.0
2017 0.359 108.1
2018 0.293 106.7
2019 0.222 104.6
2020 0.145 100.1
2021 0.067 85.3
2022 0.038 342.8
2023 0.110 306.6
2024 0.188 299.7
2025 0.261 296.8
2026 0.326 295.1
2027 0.382 294.0
2028 0.430 293.1
2029 0.469 292.4
2030 0.501 291.8

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

grafico orbita





wds15427%2B2618b.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
15427+2618 STF1967 2006 435 114 0.7 4.04 5.60 B9V+A3V NOD 154244.57+261744.3
15427+2618 STF1967 2010 439 112 0.7 4.04 5.60 B9V+A3V NOD 154244.57+261744.3
15427+2618 STF1967 2011 487 111 0.6 4.04 5.60 B9V A3V NOD 154244.57+261744.3
15427+2618 STF1967 2012 484 111 0.6 4.04 5.60 B9V A3V NOD 154244.57+261744.3

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