V500 Aquilae

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V500 Aquilae
Location of V500 Aquilae (circled in red)
Observation data
ICRS
)
Constellation Aquila
Right ascension 19h 52m 27.84s[1]
Declination +08° 28′ 46.4″[1]
Apparent magnitude (V) 6.1 - 17.8p[2]
Distance
4900[3] pc
Characteristics
Variable type
eclipsing binary
Other designations
Nova Aquilae 1943, AAVSO 1947+08
Database references
SIMBADdata

V500 Aquilae also known as Nova Aquilae 1943 was a nova which appeared in the constellation Aquila, very near the star Altair, in 1943. It was discovered by Cuno Hoffmeister on photographic plates taken at Sonneberg Observatory on 5 September 1943, when it had a photographic magnitude of 12.[4] It reached its peak brightness sometime between 13 April 1943 when it was fainter than photographic magnitude 13.5, and 2 May 1943 when its photographic magnitude was 6.55 (6.1 visual magnitude).[2]

A light curve for V500 Aquilae, plotted from data published by Gaposchkin (1943)[5]

V500 Aquilae's brightness dropped by 3 magnitudes from its peak in 42 days, making it a "fast" nova.[6]

All novae are binary stars, with a "donor" star orbiting a

eclipsing binaries, and V500 Aquilae does show eclipses. The eclipses, first seen in 1994 at the European Southern Observatory, have a depth of about 0.4 magnitudes, and the orbital period is 3.485±0.02 h.[7]

In 1984 a small (radius 2.0 arc second) nova remnant surrounding V500 Aquilae and expanding at 1380 km/sec, was discovered using the Hale Telescope.[8] The expansion of that remnant has been used to derive a distance estimate of 4900 parsecs.[3]

References

  1. ^
    S2CID 16299532
    .
  2. ^
    S2CID 115854775
    .
  3. ^
    S2CID 121626946
    .
  4. ^ Kopff, August (9 September 1943). "Nova Aquilae". IAU Circular. 961. Retrieved 26 December 2020.
  5. Bibcode:1943BHarO.917R..16G
    . Retrieved 28 October 2022.
  6. ^ Payne-Gaposchkin, Cecilia (1 January 1957). The Galactic Novae. Amsterdam: North Holland Publishing Corp.
  7. Bibcode:1999IBVS.4706....1H
    .
  8. S2CID 121851918
    .

External links
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