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HD 138042


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Photoelectric observations of lunar occultations. XIII
Occultation observations made with the 0.76 m reflector at McDonaldObservatory are presented, for 319 events occurring between Jan. 15,1981 and Feb. 7, 1982. One table reports timings, and a second recordsobservations of 16 double stars, in particular, Nu Gem observationsreveal that the two close components are similar in color. This allowsan estimation of individual visible magnitudes (near 4.60 and 5.32)suggesting that the secondary is a late B-type main-sequence star. SAO158929 observations reveal systematic differences in angular diametervalues. Of the 16 observed double stars, 9 appear to be new discoveries,including SAO 93067, SAO 94595, and SAO 98770. A third table gives fullydarkened angular diameters for the stars SAO 158929, SAO 77516 Y Tau,and SAO 119035 Nu Vir.

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Observation and Astrometry data

Constellation:Libra
Right ascension:15h29m56.69s
Declination:-14°48'50.8"
Apparent magnitude:8.576
Distance:495.05 parsecs
Proper motion RA:-17.5
Proper motion Dec:-2.8
B-T magnitude:9.896
V-T magnitude:8.685

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 138042
TYCHO-2 2000TYC 5607-241-1
USNO-A2.0USNO-A2 0750-08997387
HIPHIP 75879

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