15038+4739 STF1909 (44 Boo)

 
 
15h 03m 47.30s +47 39' 14.6" P.A. 141.70 sep 0.2 mag 5.20,6.10 Sp F7V+K4V dist. 12.51 pc (40.81 l.y.)
 
 
Coord 2000
15038+4739
Discov num
STF1909
Comp
Coord arcsec 2000
15 03 47.30 +47 39 14.6
Date first
1819
Date last
2020
Obs
855
Pa first
228
Pa last
138
P.A. Now (θ)
141.7°
Sep first
1.5
Sep last
0.2
Sep. Now (ρ)
0.23"
Mag pri
5.20
Mag sec
6.10
delta mag (ΔM)
0.9
Spectral class
F7V+K4V (yellow-white/yellow-orange)
Pri motion ra
-444
Sec motion ra
-374
Pri motion dec
+010
Sec motion dec
+039
Notes
N O (See Notes, Orbital solution)
rPM=0.171 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
138
Precise sep
0.22
Name
44 Boo
Other name
i Boo
Var name
I Boo
Constellation
Bootes
SAO
45357
HIP
73695
Tycho2
3484-01580-1
HD
133640
HR
5618
GC
20281
ADS
9494
GL
Gl 575A
BD
BD+48 2259
Flamsteed
44 Bootis
Flamsteed name
44 Boo
Distance
12.51
Distance ly
40.81
last precise pa
95.4
last precise sep
0.33
 
 
ORBITAL ELEMENTS
 
 
Period (P)214.7628y± 2.2807 Periastron (T)2011.9704y± 0.1892 Semi-major axis (a)3.70131a± 0.02931
Eccentricity (e)0.5145± 0.00455 Inclination (i)83.708°± 0.093 Longitude of periastron (ω)39.146°± 0.813
Node (Ω)56.678°± 0.13 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 2.020 53.9
2001 2.025 54.4
2002 2.022 54.9
2003 2.009 55.5
2004 1.986 56.0
2005 1.953 56.6
2006 1.909 57.1
2007 1.853 57.8
2008 1.785 58.4
2009 1.705 59.1
2010 1.613 59.9
2011 1.510 60.8
2012 1.396 61.8
2013 1.272 63.0
2014 1.139 64.5
2015 0.999 66.4
2016 0.854 68.9
2017 0.704 72.5
2018 0.555 78.0
2019 0.411 87.5
2020 0.287 106.1
2021 0.225 141.7
2022 0.273 179.4
2023 0.391 200.0
2024 0.534 210.4
2025 0.685 216.3
2026 0.838 220.1
2027 0.991 222.7
2028 1.142 224.6
2029 1.291 226.0
2030 1.437 227.2

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






wds15038%2B4739c.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
15038+4739 STF1909 2007 775 60 1.8 5.20 6.10 F7V+K4V NOD 150347.30+473914.6
15038+4739 STF1909 2008 777 59 1.7 5.20 6.10 F7V+K4V NOD 150347.30+473914.6
15038+4739 STF1909 2010 789 61 1.6 5.20 6.10 F7V+K4V NOD 150347.30+473914.6
15038+4739 STF1909 2011 795 62 1.5 5.20 6.10 F7V K4V NOD 150347.30+473914.6
15038+4739 STF1909 2012 796 63 1.2 5.20 6.10 F7V K4V NOD 150347.30+473914.6
15038+4739 STF1909 2013 798 63 1.2 5.20 6.10 F7V K4V NOD 150347.30+473914.6
15038+4739 STF1909 2014 811 66 1.1 5.20 6.10 F7V K4V NOD 150347.30+473914.6
15038+4739 STF1909 2015 817 69 1.0 5.20 6.10 F7V+K4V NO 150347.30+473914.6
15038+4739 STF1909 2016 832 72 0.9 5.20 6.10 F7V+K4V NO 150347.30+473914.6
15038+4739 STF1909 2017 837 75 0.7 5.20 6.10 F7V+K4V NO 150347.30+473914.6
15038+4739 STF1909 2018 843 81 0.5 5.20 6.10 F7V+K4V NO 150347.30+473914.6
15038+4739 STF1909 2019 853 95 0.3 5.20 6.10 F7V+K4V NO 150347.30+473914.6

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