Magnitude 9.25 Apparent magnitude (V) 9.25 | Constellation Telescopium | |
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Pv telescopii variable top 8 facts
PV Telescopii (also known as HD 168476) is a class B-type (blue) supergiant extreme helium star in the constellation Telescopium. It is also the prototype of variable stars called PV Telescopii variables.
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Properties
PV Telescopii shows radial velocity changes thought to be due to radial pulsations caused by a strange mode instability It appears as a star of magnitude 9.3. Despite a mass thought to be less than the sun, it is actually around 25,000 more luminous. The spectrum shows a strong hydrogen deficiency and strongly enhanced helium and carbon lines.
PV Telescopii variable
PV Telescopii variables are helium supergiants which vary somewhat irregularly over about 0.1 magnitude on a time-scale of hours to days. PV Telescopii is an example with variations over a few days, 8–10 days being typically quoted. It may be a late thermal pulse post-AGB star or the result of a white dwarf merger.