15155+3319 STFA 27AB (Del Boo)

 
 
15h 15m 30.16s +33 18' 53.4" P.A. 78.00 sep 105.3 mag 3.56,7.89 Sp G8IIICN-1 dist. 37.34 pc (121.8 l.y.)
 
 
Coord 2000
15155+3319
Discov num
STFA 27
Comp
AB
Coord arcsec 2000
15 15 30.16 +33 18 53.4
Date first
1780
Date last
2020
Obs
124
Pa first
84
Pa last
78
P.A. Now (θ)
78°
Sep first
135.0
Sep last
105.3
Sep. Now (ρ)
105.3"
Mag pri
3.56
Mag sec
7.89
delta mag (ΔM)
4.33
Spectral class
G8IIICN-1 (yellow)
Pri motion ra
+085
Sec motion ra
+082
Pri motion dec
-112
Sec motion dec
-110
Notes
N O V (See Notes, Orbital solution, Proper motion indicates physical)
rPM=0.026 (< 0.3, Physical double)
This double is physical.
 
 
15155+3319 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Del Boo 64589 15155+3319 STFA 27 AB 1780 2020 124 78 105.3 3.56 7.89 4.33 Y <===
Show 64589 15155+3319 SMR 31 AC 2002 2018 9 5 93.2 3.56 14.30 10.74
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
78
Precise sep
105.28
Name
Del Boo
Constellation
Bootes
SAO
64589
HIP
74666
Tycho2
2566-01639-1
Gaia DR2
1278391075716738560
HD
135722
HR
5681
GC
20523
ADS
9559
BD
BD+33 2561
Bayer
Delta Bootis
Bayer name
Del Boo
Flamsteed
49 Bootis
Flamsteed name
49 Boo
Distance
37.34
Distance ly
121.8
last precise pa
78
last precise sep
105.28
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)760c Periastron (T)22775y Semi-major axis (a)78a
Eccentricity (e)0.99 Inclination (i)74° Longitude of periastron (ω)136°
Node (Ω)91° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2005
label rho theta
2000 104.670 77.6
2001 104.668 77.6
2002 104.666 77.6
2003 104.665 77.6
2004 104.663 77.6
2005 104.661 77.6
2006 104.660 77.6
2007 104.658 77.6
2008 104.656 77.6
2009 104.655 77.6
2010 104.653 77.6
2011 104.651 77.6
2012 104.650 77.6
2013 104.648 77.6
2014 104.646 77.6
2015 104.645 77.6
2016 104.643 77.6
2017 104.641 77.6
2018 104.640 77.6
2019 104.638 77.6
2020 104.636 77.6
2021 104.635 77.6
2022 104.633 77.6
2023 104.632 77.6
2024 104.630 77.6
2025 104.628 77.6
2026 104.627 77.6
2027 104.625 77.6
2028 104.623 77.6
2029 104.622 77.6
2030 104.620 77.6


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



 
 


wds15155%2B3319a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)760c Periastron (T)39773y Semi-major axis (a)78a
Eccentricity (e)0.73 Inclination (i)86° Longitude of periastron (ω)218°
Node (Ω)75° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2005
label rho theta
2000 106.135 78.1
2001 106.133 78.1
2002 106.131 78.1
2003 106.130 78.1
2004 106.128 78.1
2005 106.127 78.1
2006 106.125 78.1
2007 106.123 78.1
2008 106.122 78.1
2009 106.120 78.1
2010 106.119 78.1
2011 106.117 78.1
2012 106.116 78.1
2013 106.114 78.1
2014 106.112 78.1
2015 106.111 78.1
2016 106.109 78.1
2017 106.108 78.1
2018 106.106 78.1
2019 106.104 78.1
2020 106.103 78.1
2021 106.101 78.1
2022 106.100 78.1
2023 106.098 78.1
2024 106.096 78.2
2025 106.095 78.2
2026 106.093 78.2
2027 106.092 78.2
2028 106.090 78.2
2029 106.088 78.2
2030 106.087 78.2


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



 
 


wds15155%2B3319b.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
15155+3319 STFA 27 AB 2012 107 78 104.6 3.56 7.89 G8IIICN-1 NODV 151530.16+331853.4
15155+3319 STFA 27 AB 2013 108 79 104.7 3.56 7.89 G8IIICN-1 NODV 151530.16+331853.4
15155+3319 STFA 27 AB 2015 109 78 106.3 3.56 7.89 G8IIICN-1 NODV 151530.16+331853.4
15155+3319 STFA 27 AB 2017 117 78 105.0 3.56 7.89 G8IIICN-1 NO V 151530.16+331853.4

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