Terebellum (astronomy)

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The Terebellum is a quadrilateral of stars in the constellation Sagittarius. It is formed of four 4th magnitude stars, all within two degrees of each other, but not gravitationally bound, being at different distances from Earth.

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[edit] ω Sagittarii

ω Sagittarii
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Sagittarius
Right ascension 19h 55m 50.4s
Declination -26° 17' 58"
Apparent magnitude (V) +4.70
Distance 77.6 ± 1.7 ly
(23.8 ± 0.5 pc)
Spectral type G3/G5III
Other designations
58 Sagittarii, HR 7597,
HD 188376, SAO 188722,
HIP 98066

Omega Sagittarii is a spectral type G5 giant with an apparent magnitude of +4.74. At 77.6 light years from Earth, it is the nearest of the four stars. ω Sagittarii is the northeast corner of the Terebellum.


[edit] 59 Sagittarii

59 Sagittarii
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Sagittarius
Right ascension 19h 56m 56.8s
Declination -27° 10' 12"
Apparent magnitude (V) +4.54
Distance 1200 ± 340 ly
(370 ± 100 pc)
Spectral type K3III
Other designations
b¹ Sagittarii, HR 7604,
HD 188603, SAO 188742,
HIP 98162

59 Sagittarii, also known by its Bayer designation b¹ Sagittarii, has an apparent magnitude of +4.54. It is a spectral type K3 giant at a distance of about 1200 light years from Earth, making it the furthest of the four stars. 59 Sagittarii is the southeast corner of the Terebellum.


[edit] 60 Sagittarii

60 Sagittarii
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Sagittarius
Right ascension 19h 58m 57.2s
Declination -26° 11' 44"
Apparent magnitude (V) +4.84
Distance 340 ± 29 ly
(104 ± 9 pc)
Spectral type G8II/III
Other designations
A Sagittarii, HR 7618,
HD 189005, SAO 188778,
HIP 98353

60 Sagittarii, or A Sagittarii, is a spectral type G8 bright giant, and the dimmest of the Terebellum, with an apparent magnitude of +4.84. It is 340 light years from Earth. 60 Sagittarii is the northwest corner of the Terebellum.


[edit] 62 Sagittarii

62 Sagittarii
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Sagittarius
Right ascension 20h 2m 39.5s
Declination -27° 42' 35"
Apparent magnitude (V) +4.43
Distance 448 ± 46 ly
(137 ± 14 pc)
Spectral type M4III
Other designations
c Sagittarii, HR 7650,
HD 189763, SAO 188844,
HIP 98688

62 Sagittarii, or c Sagittarii, is a spectral type M4 red giant, is the brightest star in the Terebellum, with a mean apparent magnitude of +4.43. It is classified as an irregular variable and it's magnitude varies between +4.37 and +4.52. It is 448 light years from Earth. 62 Sagittarii is the southwest corner of the Terebellum, and is also the farthest from the centre of the group, being 1.72° from 60 Sagittarii and 1.37° from 59 Sagittarii.

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