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 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
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
 
 
idgroup discov author
1 STF Struve, F.G.W.
 
 
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
15038+4739 STF1909 2020 855 138 0.2 5.20 6.10 F7V+K4V NO 150347.30+473914.6

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