NGC 718

NGC 718
NGC 718 as imaged by the Hubble Space Telescope with color data from the Sloan Digital Sky Survey
Observation data (J2000 epoch)
ConstellationPisces
Right ascension01h 53m 13.2826s
Declination+04° 11′ 44.805″
Redshift0.005781±0.0000300
Heliocentric radial velocity1,733±9 km/s
Distance69.7 ± 5.0 Mly (21.38 ± 1.54 Mpc)
Group or clusterNGC 676 group
Apparent magnitude (V)12.59
Characteristics
TypeSAB(s)a
Size~99,000 ly (30.35 kpc) (estimated)
Apparent size (V)2.3′ × 2.0′
Other designations
IRAS 01506+0357, 2MASX J01531331+0411453, UGC 1356, MCG +01-05-041, PGC 6993, CGCG 412-039

NGC 718 is an intermediate spiral galaxy in the constellation of Pisces. Its velocity with respect to the cosmic microwave background is 1,450±22 km/s, which corresponds to a Hubble distance of 69.7 ± 5.0 Mly (21.38 ± 1.54 Mpc). Additionally, one non-redshift measurement gives a similar distance of 69.80 Mly (21.400 Mpc). It was discovered by German-British astronomer William Herschel on 13 December 1784.

NGC 718 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.

A star-forming disk has been detected around the core of NGC 718. The size of its semi-major axis is estimated at 1,100 ly (330 pc).

Supermassive black hole

Based on measurements of the near-infrared K-band luminosity of the galaxy's bulge, NGC 718 has a supermassive black hole with a mass of 1×107.5M☉ (32 million solar masses).

NGC 676 group

NGC 718 is a member of a small group of three galaxies known as the NGC 676 group. The other two galaxies are NGC 676 and NGC 693 [fr].

Intermediate-luminosity red transient

One intermediate-luminosity red transient (ILRT) has been observed in NGC 718:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 0718". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 27 December 2025.
  2. ↑ "Distance Results for NGC 0718". NASA/IPAC Extragalactic Database. NASA. Retrieved 27 December 2025.
  3. ↑ Herschel, William (1786). "Catalogue of One Thousand New Nebulae and Clusters of Stars" (PDF). Philosophical Transactions of the Royal Society of London. 76: 457–499. Bibcode:1786RSPT...76..457H. doi:10.1098/rstl.1786.0027.
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 718". Celestial Atlas. Retrieved 27 December 2025.
  5. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
  6. ↑ "NGC 718". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 December 2025.
  7. ↑ Comerón, S.; Knapen, J. H.; Beckman, J. E.; Laurikainen, E.; Salo, H.; Martínez-Valpuesta, I.; Buta, R. J. (2010). "AINUR: Atlas of Images of NUclear Rings". Monthly Notices of the Royal Astronomical Society. 402 (4): 2462. arXiv:0908.0272. Bibcode:2010MNRAS.402.2462C. doi:10.1111/j.1365-2966.2009.16057.x.
  8. ↑ Dong, X. Y.; De Robertis, M. M. (2006). "Low-Luminosity Active Galaxies and Their Central Black Holes". The Astronomical Journal. 131 (3): 1236. arXiv:astro-ph/0510694. Bibcode:2006AJ....131.1236D. doi:10.1086/499334.
  9. ↑ Mahtessian, A. P. (1998). "Groups of galaxies. III. Some empirical characteristics". Astrophysics. 41 (3): 308–321. Bibcode:1998Ap.....41..308M. doi:10.1007/BF03036100.
  10. ↑ Valerin, G.; et al. (2025). "A study in scarlet: I. Photometric properties of a sample of intermediate-luminosity red transients". Astronomy and Astrophysics. 695. arXiv:2407.21671. Bibcode:2025A&A...695A..42V. doi:10.1051/0004-6361/202451733.
  11. ↑ "AT 2019udc". Transient Name Server. IAU. Retrieved 27 December 2025.
  12. ↑ Siebert, M. R.; Dimitriadis, G.; Kilpatrick, C. D.; Foley, R. J.; Nunez, R.; McKinnon, K.; Guhathakurta, P. (2019). "Spectroscopic Classification of AT2019udc with the Lick Shane telescope". The Astronomer's Telegram. 13263: 1. Bibcode:2019ATel13263....1S.