QV Tel, CD−56°7256, FK5 1474, GC 24906, HD 167128, HIP 89605, HR 6819, SAO 245369[13]
Database references
SIMBAD
data
HR 6819, also known as HD 167128 or QV Telescopii (abbreviated QV Tel), is a double star system in the southern constellation of Telescopium. It is in the south-western corner of the constellation, near Pavo to the south and Ara to the west. The system appears as a variable star that is dimly visible to the naked eye with an apparent magnitude that ranges from 5.32 down to 5.39, which is comparable to the maximum brightness of the planet Uranus. It is about 1,120 light years from the Sun, and is drifting farther away at a rate of 9.4 km/s. Due to its location in the sky, it is visible only to observers south of 33°N latitude.
A May 2020 study hypothesized that the system contained two stars and a black hole, which would have been the closest known black hole, and the first one in a system visible to the naked eye. A study in July of the same year concluded that rather than a triple system it was much more likely to be a black hole and a star orbiting at one distance from here and another star at a different distance. Three further papers in 2020 and one in 2022 concluded that HR 6819 is simply a binary system with two main-sequence stars and no black hole at all.[9]
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^An initial fit for the orbit gave an eccentricity consistent with zero given the uncertainty, so a second fit was done fixing the eccentricity at zero.
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HR6819, also known as HD 167128 or QV Telescopii (abbreviated QV Tel), is a double star system in the southern constellation of Telescopium. It is in...
hole. The system differs from "black hole impostors" such as LB-1 and HR6819 in that the evidence for a black hole does not depend on the mass of the...
the first known visible star system with a black hole, QV Telescopii (HR6819), however observations in 2022 indicated that this is a binary system of...
14, 2020, the rotation period of the comet was reported to be "7.58±0.03 hr". A number of authors have suggested considering the comet a great comet....
related to NGC 6819 at Wikimedia Commons NGC 6819 at SEDS NGC 6819 at Silicon Owl NGC 6819 at Messier45[permanent dead link] NGC 6819 on WikiSky: DSS2...
HR 7484 (V1143 Cyg) is a binary star system in the northern constellation of Cygnus. It is dimly visible to the naked eye under good viewing conditions...
Association Cygnus OB2 Cygnus OB7 Cygnus OB9 Open Berkeley 86 DR 6 IC 5146 Messier 29 Messier 39 NGC 6811 NGC 6819 NGC 6834 NGC 6866 NGC 6871 NGC 6910...
It is also known as Nova Cygni 1876, and has the designation NGC 7114, and HR 8296. Nova Cygni is located in the northwestern portion of Cygnus along the...
Tycho Catalogues". Retrieved 2006-12-26. Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". Retrieved 2006-12-26. Roman, N. G. (1987)...
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