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Nova Herculis 2021

A visual band light curve for Nova Herculis 2021, plotted from AAVSO data. The green point in the lower left corner shows the pre-discovery ASAS-SN data point. The inset plot shows the time of peak brightness.
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Hecules
Right ascension	18 57 30.98
Declination	+16° 53′ 39.6″
Apparent magnitude (V)	6.0 - <20.5 (g band)
Astrometry
Distance	~4,750 pc
Characteristics
Variable type	Nova
Other designations
V1674 Her, TCP J18573095+1653396, ZTF19aasfsjq
Database references
SIMBAD	data

Nova Herculis 2021, also known V1674 Herculis, was a nova in the constellation Hercules. It reached a peak brightness of magnitude 6.0, making it visible to the naked eye under ideal observing conditions. It was discovered on June 12, 2021, by Seiji Ueda of Kushiro Japan, just hours before it obtained peak brightness. The discovery images were taken with a Canon EOS 6D digital camera with a 200 mm lens, when the nova was at magnitude 8.4. Subsequent analysis of ASAS-SN data showed the star had a magnitude of 16.62 (g band) 8.4 hours before it was discovered. Of the galactic novae for which detailed light curves are available, Nova Herculis 2021 had the fastest decline from peak brightness ever seen. This nova has been detected throughout the electromagnetic spectrum, from radio to gamma rays.

All novae are binary stars, consisting of a white dwarf orbited by a mass-losing "donor star". Photometric observations taken during June, July and August 2021 found that binary pair's orbital period is 3.670416 ± 0.0008 hours. The Zwicky Transient Facility had been observing the region of the sky containing Nova Herculis 2021 since March 2018, and analysis of that data yielded a spin period of 8.357 minutes for the white dwarf.

References

1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
2. ^ Aydi, E.; Sokolovsky, K. V.; Chomiuk, L.; Strader, J.; Kawash, A.; Page, K. L.; Boussin, C.; Ikonnikova, N.; Atapin, K. E.; Belinski, A. A.; Burlak, M. A.; Dodin, A. V.; Maslennikova, N. A.; Postnov, K. A.; Potanin, S. A.; Safonov, B. S.; Shatsky, N. I.; Tatarnikov, A. M.; Korotkiy, S.; Stanek, K. Z.; Kochanek, C. S.; Shappee, B. J. (June 2021). "Multi-wavelength follow up of the very fast Nova Herculis 2021 (TCP J18573095+1653396)". The Astronomer's Telegram. 14710: 1. Bibcode:2021ATel14710....1A.
3. ^ Schmidt, R. E.; Shugarov, S. Y.; Afonina, M. D. (December 2021). "The Photometric Period of V1674 Herculis (Nova Her 2021)". The Journal of the American Association of Variable Star Observers. 49 (2): 257. Bibcode:2021JAVSO..49..257S.
4. "V1674 Her". The International Variable Star Index. AAVSO. Retrieved 12 June 2022.
5. ^ Woodward, C. E.; Banerjee, D. P. K.; Geballe, T. R.; Page, K. L.; Starrfield, S.; Wagner, R. M. (November 2021). "Near-infrared Studies of Nova V1674 Herculis: A Shocking Record Breaker". The Astrophysical Journal Letters. 922 (1): L10. arXiv:2110.13053. Bibcode:2021ApJ...922L..10W. doi:10.3847/2041-8213/ac3518. S2CID 239769198.
6. "CBAT "Transient Object Followup Reports"". Central Bureau for Astronomical Telegrams. Harvard University. Retrieved 6 June 2022.
7. Drake, Jeremy J.; Ness, Jan-Uwe; Page, Kim L.; Luna, G. J. M.; Beardmore, Andrew P.; Orio, Marina; Osborne, Julian P.; Mróz, Przemek; Starrfield, Sumner; Banerjee, Dipankar P. K.; Balman, Solen; Darnley, M. J.; Bhargava, Y.; Dewangan, G. C.; Singh, K. P. (December 2021). "The Remarkable Spin-down and Ultrafast Outflows of the Highly Pulsed Supersoft Source of Nova Herculis 2021". The Astrophysical Journal Letters. 922 (2): L42. arXiv:2110.14058. Bibcode:2021ApJ...922L..42D. doi:10.3847/2041-8213/ac34fd. S2CID 239998563.
8. Mroz, P.; Burdge, K.; van Roestel, J.; Prince, T.; Kong, A. K. H.; Li, K. L. (June 2021). "An 8.4 min period in the archival ZTF light curve of Nova Herculis 2021". The Astronomer's Telegram. 14720: 1. Bibcode:2021ATel14720....1M.

External links

• "A new nova disappeared faster than ever, and an even bigger cosmic catastrophe is coming". Starts With a Bang. 15 June 2022.

v t e Constellation of Hercules
Hercules–Corona Borealis Great Wall Hercules in Chinese astronomy List of stars in Hercules
Stars	Bayer α (Rasalgethi) β (Kornephoros) γ δ (Sarin) ε ζ η θ ι κ (Marsic) λ (Maasym) μ ν ξ ο π ρ σ τ υ φ χ ψ ψ ω (Cujam) Flamsteed 14 29 (h) 30 (g) 42 45 (l) 52 60 68 (u) 69 (e) 72 (w) 89 93 98 99 (b) 102 104 (A) 106 109 110 111 112 32 Oph Variable X AC AM BL DI DQ V446 V533 V772 V777 V838 V1674 HR 6669 6697 6806 HD 146389 (Irena) 147506 (Hunor) 149026 (Ogma) 152843 154345 155358 156668 159062 164595 164922 Other BD +17° 3248 Furuhjelm 46 GD 362 Gliese 623 Gliese 638 Gliese 649 Gliese 686 GJ 3991 HAT-P-14 (Franz) HAT-P-18 HAT-P-67 Hercules X-1 GSC 02620-00648 Ross 640 TrES-3 (Pipoltr) TOI-561 TYC 1031-1262-1 WASP-103 WISE 1738+2732 WISE 1741+2553
Exoplanets 14 Herculis b c HAT-P-14b (Sissi) HD 149026 b (Smertrios) HD 164922 b c TOI-561 b WASP-103b
Star clusters Messier 13 Messier 92 NGC 6229 Palomar 14
Nebulae Abell 39 NGC 6210
Galaxies	NGC 6028 6039 6040 6041 6042 6043 6044 6045 6046 6047 6052 6053 6054 6055 6056 6057 6061 6078 6158 6166 6181 6207 6212 6239 6261 6263 6308 6452 6560 Other 1ES 1741+196 2MASX J16270254+4328340 3C 345 3C 346 A2261-BCG Arp 272 (NGC 6050 and IC 1179) AT2018cow IC 1182 IC 1189 Hercules Dwarf Hercules A IC 1192 IC 4617 Markarian 501 MCG+07-33-027 PGC 2046648 QSR J1819+3845 RX J1633.3+4718 UGC 11105
Galaxy clusters Abell 2152 Abell 2199 Hercules Cluster Hercules Superclusters Zwicky's Triplet
Astronomical events LBG-2377
Category

• Novae
• Hercules (constellation)
• 2021 in science
• Objects with variable star designations
• Astronomical objects discovered in 2021