Astronomy:V572 Velorum

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Short description: Nova that occurred in 2025
V572 Velorum
Approximate location of V572 Velorum (circled in red)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Vela
Right ascension  10h 25m 13.90s[1]
Declination −53° 31′ 18.9″[1]
Apparent magnitude (V) 4.8 – 22.2[2]
Characteristics
Variable type Nova + SU UMa dwarf nova[3]
Other designations
Nova Velorum 2025, PNV J10251200-5331109, V572 Vel[1]

V572 Velorum, also known as Nova Velorum 2025, is a bright nova in the constellation Vela discovered by John Seach, and independently by Andrew Pearce, on 25 June 2025.[1] At the time of its discovery, it had an apparent visual magnitude of 5.7, which is just visible to the naked eye.[1] It reached a peak brightness of 4.8 on June 27.[2] On 15 January 2026, it was reported that the nova had been detected in a precovery image on 20 June 2025 by the SPHEREx space observatory.[4]

A visual band light curve for V572 Velorum, plotted from AAVSO data[5]

All novae are binary stars, with matter from a "donor" star accreting onto a white dwarf. In the case of V572 Velorum, the orbital period is 0.12317997±0.00000010 days (2.96 h).[6] Observations of the system before the 2025 explosion show the nova has already undergone fainter outbursts with both "long" (over 13 days) and "short" (3 to 4 days) periods. It is thus classified as a dwarf nova of the SU Ursae Majoris variable type.[3] A spectrum taken of 572 Velorum on 30 June 2025 looks typical of a Fe II-type classical nova.[7]

Sequence showing the change in brightness from July 26th to August 7th
  • V572 Velorum - Captured in Sydney on 26-Jul-2025
    V572 Velorum - Captured in Sydney on 26-Jul-2025
  • V572 Velorum. Captured from Sydney, July 27, 2025. Single 30-second exposure (no stacking).
    V572 Velorum. Captured from Sydney, July 27, 2025. Single 30-second exposure (no stacking).
  • V572 Velorum. Captured from Sydney, Aug 7, 2025. Luminosity had decayed considerably.
    V572 Velorum. Captured from Sydney, Aug 7, 2025. Luminosity had decayed considerably.

See also

  • List of novae in the Milky Way galaxy
  • Supernova

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Seach, John; Pearce, Andrew; Yoshimoto, K.; Guido, E.; Rocchetto, M.; McNaught, R. H.; Amorim, A.; Aguiar, J. G. de S. et al. (2025). "V572 Velorum = Nova Velorum 2025 = PNV J10251200-5331109". Central Bureau Electronic Telegrams (5574): 1. Bibcode: 2025CBET.5574....1S. http://www.cbat.eps.harvard.edu/iau/cbet/005500/CBET005574.txt. 
  2. ↑ 2.0 2.1 "VSX: Detail for V0572 Vel". AAVSO. https://vsx.aavso.org/index.php?view=detail.top&oid=10848746. 
  3. ↑ 3.0 3.1 Ulaczyk, K.; Mroz, P.; Udalski, A. (2025). "OGLE Pre-Eruption Observations of V572 Velorum Reveal Dwarf Nova Outbursts". The Astronomer's Telegram 17253: 1. Bibcode: 2025ATel17253....1U. https://www.astronomerstelegram.org/?read=17253. Retrieved 2025-06-30. 
  4. ↑ Banerjee, D. P.K.; Joshi, V.; Evans, A.; Woodward, C.E.; Starrfield, S. (2026). "Detection of Nova V572 Vel by SPHEREx that precedes the optical discovery". The Astronomer's Telegram 17601: 1. Bibcode: 2026ATel17601....1B. https://www.astronomerstelegram.org/?read=17601. Retrieved 2026-01-15. 
  5. ↑ "Download Data". AAVSO. https://www.aavso.org/data-download. 
  6. ↑ 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. 
  7. ↑ Kaufman, R. (2 July 2025). "V572 VELORUM". Central Bureau Electronic Telegrams (IAU) (5577). http://www.cbat.eps.harvard.edu/iau/cbet/005500/CBET005577.txt. Retrieved 2 July 2025. 

Coordinates: Sky map 10h 25m 13.90s, −53° 31′ 18.9″



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