Star in the constellation Ara
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! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000.0      Equinox J2000.0
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Spectral type
! style="text-align:left" | B−V 
! style="text-align:left" | Variable type
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HD 149989 is a single, variable star in the southern constellation of Ara, located near the western constellation border with Norma. It has the variable star designation "V872 Arae", while "HD 149989" is the identifier from the "Henry Draper Catalogue". This is a dim star near the lower limit of visibility to the naked eye with an apparent visual magnitude that fluctuates around 6.30. It is located at a distance of 167 light years from the Sun based on parallax, and is drifting further away with a radial velocity of 46 km/s.
HD 149989 was discovered to be a variable star when the data from the "Hipparcos" mission was analyzed. The discovery was published in 1997, in the list of periodic variables seen by that satellite. In 1998, Conny Aerts "et al." sifted through that list, and determined that HD 149989 is a Gamma Doradus type star. It has a period of 0.42658 days. It was given its variable star designation in March 2000.
This object is an A-type main-sequence star with a stellar classification of A9 V. A 2016 survey of γ Doradus stars found a class of F1 V nn m-4, where the 'nn' indicates "nebulous" lines due to rapid rotation and the 'm-4' means a metal-poor star with metal lines that match a class of A7. It is around 1.1 billion years old and is spinning with a projected rotational velocity of 136 km/s.
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