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V462 Lupi

V462 Lupi
Approximate location of V462 Lupi (circled in red)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lupus
Right ascension 15h 08m 03.274s[1]
Declination −40° 08′ 29.58″[1]
Apparent magnitude (V) 5.3 – 18.5[2]
Characteristics
Variable type Nova
Other designations
AT 2025nlr, Nova Lupi 2025, ASASSN-25cm, V462 Lup[3]

V462 Lupi, also known as Nova Lupi 2025,[3] is a bright nova in the constellation Lupus discovered by All Sky Automated Survey for SuperNovae (ASAS-SN) on 12 June 2025.[1] At the time of its discovery, it had an apparent visual magnitude of 8.7.[1] It was classified as a classical nova on 14 June 2025.[4]

A visual band light curve for V462 Lupi, plotted from AAVSO[5] and ASAS-SN[1] data (red point)

By 18 June 2025, it had brightened to magnitude 5.7, making it just visible to the naked eye.[6] The peak brightness, magnitude 5.5, was reached on 20 June 2025,[7] and around 10 July 2025 it became too faint to see with the naked eye even under ideal conditions.

All novae are binary stars, with matter from a "donor" star accreting onto a white dwarf. In the case of V462 Lupi, the orbital period is 0.07488825(16) days (1.80 h).[8]

An image of Nova V462 Lupi, captured by the Dwarf 3 telescope in Sydney on August 6, 2025, shows that its luminosity had decayed considerably after five weeks.
An image of Nova V462 Lupi, captured by the Dwarf 3 telescope in Sydney on August 6, 2025, shows that its luminosity had decayed considerably after five weeks.
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  • Photograph of V462 Lupi
    Photograph of V462 Lupi
V462 Lupi was captured by the Dwarf 3 smart telescope in Sydney on 29 June 2025, using an astro filter. The image consists of 120 stacked exposures of 30 seconds each, with a sensor gain of 60.
V462 Lupi – Observed using the Dwarf 3 smart telescope in Sydney on 29-Jun-2025, with brightness comparable to HR Lupi.

See also

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References

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  1. ^ a b c d e "AT 2025nlr". Transient Name Server. IAU. Retrieved 19 June 2025.
  2. ^ "VSX: Detail for V0462 Lup". International Variable Star Index. AAVSO. Retrieved 20 June 2025.
  3. ^ a b Pearce, A.; Stanek, K. Z. (16 June 2025). "V462 LUPI = NOVA LUPI 2025". Central Bureau Electronic Telegrams (5570): 1.
  4. ^ Tampo, Yusuke (2025). "Spectroscopic Classification of ASASSN-25cm (=AT 2025nlr) as a Classical Nova". The Astronomer's Telegram. 17228: 1. Bibcode:2025ATel17228....1T. Retrieved 19 June 2025.
  5. ^ "Download Data". aavso.org. AAVSO. Retrieved 20 June 2025.
  6. ^ Baker, Harry (19 June 2025). "A 'new star' has exploded into the night sky — and you can see it from North America". Live Science. Retrieved 19 June 2025.
  7. ^ Schaefer, Bradley E. (23 June 2025). "Bright nova V462 Lup Has Orbital Period of 1.797 Hours, at the Bottom of the Period Gap". The Astronomer's Telegram. 17240: 1. Bibcode:2025ATel17240....1S. Retrieved 26 June 2025.
  8. ^ Schaefer, Bradley E. (2025-08-07). "Discovery of 6 New Orbital Periods for Classical Novae". Research Notes of the AAS. 9 (8): 213. doi:10.3847/2515-5172/adf7a3. ISSN 2515-5172.
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