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Current system
15038+4739
STF 1909
44 Boo


Nearby doubles
15' : 15025+4745
H 6 53AB

35' : 15054+4809
BU 1086

36' : 15003+4740
ZHN 28

40' : 15006+4717
STT 291

61' : 14595+4658
WSP 113AB

66' : 15060+4637
SKF 719

68' : 14593+4649
COU1760

71' : 14573+4806
ES 2647

72' : 15105+4800
HDS2131AB

78' : 15077+4632
COU1761

87' : 15108+4651
STF1920

91' : 15108+4640
ARG 27

106' : 15127+4835
ES 2648AB

106' : 15129+4650
ES 624AB

107' : 15027+4554
ES 1086

113' : 14559+4900
NSN 661

117' : 14559+4905
GAI9013AB

119' : 15145+4831
LDS4539

120' : 15010+4543
HDS2119

120' : 14529+4828
LEP 70

123' : 14592+4933
LDS4519

124' : 14558+4914
BEM 14

124' : 14545+4620
CBL 475

126' : 15089+4934
CAC 9

132' : 14595+4944
ES 963

136' : 15097+4942
BEM 16



Selections
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Binocular doubles
Binary Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

15038+4739 STF 1909 (44 Boo)

 
 
15h 03m 47.30s +47° 39' 14.6" P.A. 216.00 sep 0.7 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 2024 Obs 867
Pa first 228 Pa last 215.7 P.A. Now (θ) 220.1° (calc)
Sep first 1.5 Sep last 0.67 Sep. Now (ρ) 0.838" (calc)
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
 
 
Name 44 Boo Var name i Boo Constellation Bootes SAO 45357
HIP 73695 Tycho2 3484-01580-1 HD 133640 HR 5618
GC 20281 ADS 9494 BD BD+48 2259 Flamsteed 44 Bootis
Flamsteed name 44 Boo Distance 12.51 Distance ly 40.81
 
 
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 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 53.9 2.020
2001 54.4 2.025
2002 54.9 2.022
2003 55.5 2.009
2004 56.0 1.986
2005 56.6 1.953
2006 57.1 1.909
2007 57.8 1.853
2008 58.4 1.785
2009 59.1 1.705
2010 59.9 1.613
2011 60.8 1.510
2012 61.8 1.396
2013 63.0 1.272
2014 64.5 1.139
2015 66.4 0.999
2016 68.9 0.854
2017 72.5 0.704
2018 78.0 0.555
2019 87.5 0.411
2020 106.1 0.287
2021 141.7 0.225
2022 179.4 0.273
2023 200.0 0.391
2024 210.4 0.534
2025 216.3 0.685
2026 220.1 0.838
2027 222.7 0.991
2028 224.6 1.142
2029 226.0 1.291
2030 227.2 1.437
2031 228.1 1.579
2032 228.9 1.719
2033 229.6 1.854
2034 230.2 1.987
2035 230.7 2.116
2036 231.2 2.241
2037 231.6 2.363
2038 231.9 2.481
2039 232.3 2.595
2040 232.6 2.707
2041 232.9 2.814
2042 233.1 2.919
2043 233.4 3.020
2044 233.6 3.117
2045 233.8 3.212
2046 234.0 3.303
2047 234.2 3.392
2048 234.4 3.477
2049 234.6 3.559
2050 234.7 3.639


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds15038%2B4739c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS 15038+4739 STF 1909 (44 Boo) : NOTES
 
 
discov_num notes refcode
STF1909 44 Boo.
Spectral types and masses of components assigned by ten Brummelaar et
al., based on adaptive optics observations. TtB2000
A is SB1, P=75240d (Abt2006). Tok2014d
B is a W UMa-type eclipsing binary.
Star B is W UMa-type eclipsing SB2; P = 0.2678 d (Popper 1943; Ppp1943
Binnendijk 1955, AJ 60, 355). The RV of pair B differs by +30 km/s
from that of star A, much more than the visual motion can effect, and
thus does not represent the true mass-center velocity of B. The
eclipsing period undergoes intrinsic changes considerably larger than
a lighttime effect in the orbit AB. Attempts to identify the ascending
node are thus unreliable: Time shifts of light minima suggest the
first quadrant (Plaut), the RV difference the third quadrant (Heintz).
The close approach in the visual orbit in recent years has prevented
continued study of the eclipsing system.
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
1975.383: The visual binary has been observed here. BLM1978
H 1 15. MEv2010
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 2.19 +/- 0.15, 2.02, and 1.83 Msun, respectively. Mlk2012
The B component is the W UMa type eclipsing binary i Boo. Zas2009
 
 
REFERENCES
 
 
refcode metd author reference
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
BLM1978 S j Morgan, B.L., Beddoes, D.R., Scaddan, R.J. & Dainty, J.C. 1978MNRAS.183..701M
BLM1978 MNRAS 183, 701, 1978
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019
Izm2019
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Ppp1943 - Popper, D.M. 1943ApJ....97..394P
Ppp1943 ApJ 97, 394, 1943
Tok2014d E2 - Tokovinin, A. 2014AJ....147...86T
Tok2014d AJ 147, 86, 2014
TtB2000 Ac j ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr., 2000AJ....119.2403T
TtB2000 Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000 AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)
Zas2009 orb - Zasche, P., Wolf, M., Hartkopf, W.I., Svoboda, P., Uhlar, R., Liakos, A., & 2009AJ....138..664Z
Zas2009 Gazeas, K.
Zas2009 AJ 138, 664, 2009
 
 
DISCOVERER
 
 
discov author
BAZ Baize, P.
IZM Izmailov, I.S., Khovricheva, M.L., Khovrichev, M. Yu., Kiyaeva, O.V., Khrutskaya,
IZM E.V., Romanenko, L.G., Grosheva, E.A., Maslennikov, K.L. & Kalinichenko, O.A.
TOK Tokovinin, A., Cantarutti, R., Tighe, R., Schurter, P., van der Bliek, N.,
TOK Martinez, M., & Mondaca, E.
TOK Tokovinin, A., Corbett, H., Fors, O., Howard, W., Law, N.M., Moe, M.,
TOK Tokovinin, A. & Briceno, C.
TTB ten Brummelaar, T.A., Mason, B.D., Bagnuolo, W.G., Jr., Hartkopf, W.,
TTB McAlister, H.A., & Turner, N.H.
TTB ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,
TTB Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
ZAS Zasche, P., Jurysek, J., Nemravova, J., Uhlar, R., Svoboda, P., Wolf, M., Honkova,
ZAS K., Masek, M., Prouza, M., Cechura, J., Korcakova, D. & Slechta, M.
ZAS Zasche, P., Uhlar, R., Svoboda, P., Jurysek, J., Korcakova, D., Wolf, M.,
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr dm_number notes coord_arcsec_2000
15038+4739 STF1909 2007 775 60 1.8 5.20 6.10 F7V+K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2008 777 59 1.7 5.20 6.10 F7V+K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2010 789 61 1.6 5.20 6.10 F7V+K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2011 795 62 1.5 5.20 6.10 F7V K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2012 796 63 1.2 5.20 6.10 F7V K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2013 798 63 1.2 5.20 6.10 F7V K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2014 811 66 1.1 5.20 6.10 F7V K4V +48 2259 NOD 150347.30+473914.6
15038+4739 STF1909 2015 817 69 1.0 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2016 832 72 0.9 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2017 837 75 0.7 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2018 843 81 0.5 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2019 853 95 0.3 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2020 855 138 0.2 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2022 866 195 0.3 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6
15038+4739 STF1909 2024 866 214 0.6 5.20 6.10 F7V+K4V +48 2259 NO 150347.30+473914.6

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

 
 
WDS 15038+4739 STF 1909 (44 Boo) : VISUAL OBSERVATIONS REPORTS
 
 
Show date username difficulty separation pa_estim interest notes
Show 11/04/26 voyager75 very difficult separated   very interesting Molto bella, si sdoppia nei moment di calma, per lo più a 303X si mostra come un 8 all’interno dell’anello Sembrano entrambe bianche

 
 
WDS 15038+4739 STF 1909 (44 Boo) : MEASURES
 
 
No records found.

 
 
WDS 15038+4739 (44 Boo) : VIRTUAL EYEPIECE
 
 

15038+4739 STF1909A mag 5.2 Sp F7V 15038+4739 STF1909B sep 0.7 P.A. 215.70 mag 6.1 Sp K4V virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 15038+4739 (44 Boo) : ALADIN DSS IMAGE @ 15h 03m 47.30s +47° 39' 14.6"
 
 
 
 
WDS 15038+4739 STF 1909 (44 Boo) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

15038+4739 STF1909 distance=0' 15025+4745 H 6 53AB distance=15' 15025+4745 L 9001AC distance=15' 15054+4809 BU 1086 distance=35' 15003+4740 ZHN 28 distance=36' 15006+4717 STT 291 distance=40' 14595+4658 WSP 113AB distance=61' 15060+4637 SKF 719 distance=66' 14593+4649 COU1760 distance=68' 14573+4806 ES 2647 distance=71' 15105+4800 HDS2131AB distance=72' 15105+4800 HDS2131AC distance=72' 15077+4632 COU1761 distance=78' 15108+4651 STF1920 distance=87' 15108+4640 ARG 27 distance=91' 15127+4835 ES 2648AB distance=106' 15127+4835 POP1220AC distance=106' 15127+4835 CTT 14AD distance=106' 15129+4650 ES 624BC distance=106' 15129+4650 ES 624AB distance=106' 15129+4650 HJ 2770AC distance=106' 15027+4554 ES 1086 distance=107' 14559+4900 NSN 661 distance=113' 14559+4905 GAI9013AB distance=117' 14559+4905 GAI9013AC distance=117' 15145+4831 LDS4539 distance=119' 15010+4543 HDS2119 distance=120' 14529+4828 LEP 70 distance=120' 14592+4933 LDS4519 distance=123' 14558+4914 BEM 14 distance=124' 14545+4620 CBL 475 distance=124' 15089+4934 CAC 9 distance=126' 14595+4944 ES 963 distance=132' 15097+4942 BEM 16 distance=136' 15167+4702 KPP1863 distance=137' 15173+4731 GRV1207 distance=137' 15009+4526 HDS2118AB distance=137' 15009+4526 GII 214Aa,Ab distance=137' 14595+4528 DAM 30 distance=139' 14521+4629 HDS2097 distance=140' 15175+4804 COU1762 distance=141' 14574+4530 HJ 2759 distance=144' 15084+4958 SKF 723 distance=146' 15126+4544 MCT 8 distance=148' 15016+4513 BRT 338 distance=148' 15155+4610 UC 2972 distance=149' 15085+5002 COU2195 distance=151' 14492+4814 HU 647 distance=151' 14591+5003 SLW1048 distance=151' 14497+4843 STF1890 distance=155' 14496+4634 STT 286AB distance=159' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 15038+4739 STF1909 216 0.7 0
Show 15025+4745 H 6 53 AB 358 87.1 15
Show 15025+4745 L 9001 AC 72 10.8 15
Show 15054+4809 BU 1086 252 6.5 35
Show 15003+4740 ZHN 28 203 4.2 36
Show 15006+4717 STT 291 156 35.7 40
Show 14595+4658 WSP 113 AB 290 2.4 61
Show 15060+4637 SKF 719 89 1.8 66
Show 14593+4649 COU1760 249 0.2 68
Show 14573+4806 ES 2647 119 9.1 71
Show 15105+4800 HDS2131 AB 135 0.2 72
Show 15105+4800 HDS2131 AC 60 3.5 72
Show 15077+4632 COU1761 268 1.2 78
Show 15108+4651 STF1920 109 18.7 87
Show 15108+4640 ARG 27 45 18.5 91
Show 15127+4835 ES 2648 AB 341 26.4 106
Show 15127+4835 POP1220 AC 305 0.7 106
Show 15127+4835 CTT 14 AD 60 109.7 106
Show 15129+4650 ES 624 BC 119 19.9 106
Show 15129+4650 ES 624 AB 227 3.0 106
Show 15129+4650 HJ 2770 AC 127 19.2 106
Show 15027+4554 ES 1086 266 2.4 107
Show 14559+4900 NSN 661 36 1.9 113
Show 14559+4905 GAI9013 AB 139 0.8 117
Show 14559+4905 GAI9013 AC 270 3.5 117
Show 15145+4831 LDS4539 11 367.9 119
Show 15010+4543 HDS2119 129 0.2 120
Show 14529+4828 LEP 70 72 347.0 120
Show 14592+4933 LDS4519 299 177.3 123
Show 14558+4914 BEM 14 151 27.2 124
Show 14545+4620 CBL 475 35 22.8 124
Show 15089+4934 CAC 9 337 0.3 126
Show 14595+4944 ES 963 204 6.2 132
Show 15097+4942 BEM 16 67 25.4 136
Show 15167+4702 KPP1863 114 14.4 137
Show 15173+4731 GRV1207 159 18.9 137
Show 15009+4526 HDS2118 AB 164 2.0 137
Show 15009+4526 GII 214 Aa,Ab 108 0.1 137
Show 14595+4528 DAM 30 203 63.1 139
Show 14521+4629 HDS2097 46 0.5 140
Show 15175+4804 COU1762 72 1.1 141
Show 14574+4530 HJ 2759 97 17.5 144
Show 15084+4958 SKF 723 48 1.9 146
Show 15126+4544 MCT 8 220 0.5 148
Show 15016+4513 BRT 338 186 2.9 148
Show 15155+4610 UC 2972 180 30.6 149
Show 15085+5002 COU2195 14 0.2 151
Show 14492+4814 HU 647 99 0.2 151
Show 14591+5003 SLW1048 6 8.3 151
Show 14497+4843 STF1890 46 2.9 155
Show 14496+4634 STT 286 AB -1 -1.0 159

 
 
WDS 15038+4739 : COMPONENTS
 
 
  A
B pa=215.7°
sep=0.67"
 
 
15038+4739 A
 
 
Name 44 Boo Coord arcsec 2000 150347.30+473914.6 Mag 5.2 Spectral class F7V (yellow-white)
PmRA -444.00 PmDE 10.0 Tycho2 3484-01580-1 HD 133640
Flamsteed 44 Bootis Flamsteed name 44 Boo
Tycho2
Tycho2 3484-01580-1 Pflag RAmdeg 225.94708662 DEmdeg 47.65404245
PmRA -443.7 PmDE 9.9 E RAmdeg 3 E DEmdeg 4
E pmRA 1.2 E pmDE 1.2 EpRAm 1991.50 EpDEm 1991.42
Num 9 Q RAmdeg 2.0 Q DEmdeg 1.5 Q pmRA 2.0
Q pmDE 1.4 BTmag 5.846 E BTmag 0.014 VTmag 5.203
E VTmag 0.009 Prox 17 TYC T HIP 73695
CCDM A RAdeg 225.94862694 DEdeg 47.65401944 EpRA 1990 1.58
EpDE 1990 1.57 E RAdeg 3.4 E DEdeg 3.5 Posflg D
Corr -0.2
CCDM
Ccdm 15038+4739 RComp Comp A Note1
Note2 Discov num DRAs -0.48 DDEs 15.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 5.3 Sp G0 PmNote *
PmRA -394 PmDE 26 Dm number +48 2259 Cat1 BD
Name2 45357 Cat2 SAO HD 133640 M HD
ADS BDS A 9494 M ADS BDS N IDS IDS 15005N4803A
HIC 73695
 
 
15038+4739 B
 
 
Coord arcsec 2000 150347.26+473914.1 Mag 6.1 Spectral class K4V (yellow-orange) PmRA -374.00
PmDE 39.0 Tycho2 3484-01580-2 Delta magnitude 0.9 Coordinate calculated yes
Tycho2
Tycho2 3484-01580-2 Pflag RAmdeg 225.94785050 DEmdeg 47.65442558
PmRA -374.3 PmDE 39.4 E RAmdeg 4 E DEmdeg 4
E pmRA 3.8 E pmDE 3.6 EpRAm 1991.58 EpDEm 1991.54
Num 3 Q RAmdeg 0.0 Q DEmdeg 0.2 Q pmRA 0.0
Q pmDE 0.3 BTmag 7.015 E BTmag 0.015 VTmag 6.095
E VTmag 0.010 Prox 17 TYC HIP 73695
CCDM B RAdeg 225.94914833 DEdeg 47.65433306 EpRA 1990 1.59
EpDE 1990 1.55 E RAdeg 3.7 E DEdeg 3.8 Posflg D
Corr -0.2
CCDM
Ccdm 15038+4739 RComp Comp B Note1 *
Note2 Discov num STF1909 DRAs DDEs
R dRAs Year 1832 Theta Rho
Obs 99 Vmag 6.2 Sp PmNote
PmRA -388 PmDE 34 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 9494 M ADS BDS N IDS IDS 15005N4803B
HIC 73695