NGC 7721 - Misplaced Pages

Galaxy in the constellation Aquarius

NGC 7721
A Sloan Digital Sky Survey (SDSS) image of NGC 7721
Observation data (J2000 epoch)
Constellation	Aquarius
Right ascension	23 38 48.65
Declination	−06° 31′ 04.30″
Redshift	0.006728 ± 2.00e-6
Distance	79 Mly (24.47 Mpc)
Apparent magnitude (V)	11.6
Characteristics
Type	SA(s)c
Size	70,000 ly
Apparent size (V)	Unknown
Notable features	N/A
Other designations
PGC 72001, AGC 630233, IRAS 23362-0647, LEDA 72001

NGC 7721 is a spiral galaxy located around 79 million light-years away in the constellation Aquarius. NGC 7721 was discovered on September 10, 1785, by the astronomer William Herschel, and its diameter is 70,000 light-years across. NGC 7721 is not known to have much star formation, and it is not known to have an active galactic nucleus. A supernova was observed in NGC 7721 in 2007, named 2007le.

References

^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-04-13.
"NGC 7721 - Spiral Galaxy in Aquarius | TheSkyLive.com". theskylive.com. Retrieved 2024-04-13.
"New General Catalog Objects: NGC 7700 - 7749". cseligman.com. Retrieved 2024-04-13.
Johansson, J.; Goobar, A.; Kasliwal, M. M.; Helou, G.; Masci, F.; Tinyanont, S.; Jencson, J.; Cao, Y.; Fox, O. D.; Kromer, M.; Amanullah, R.; Banerjee, D. P. K.; Joshi, V.; Jerkstrand, A.; Kankare, E.; Prince, T. A. (7 January 2017). "Spitzer observations of SN 2014J and properties of mid-IR emission in Type Ia supernovae". Monthly Notices of the Royal Astronomical Society. 466 (3): 3442–3449. arXiv:1411.3332. doi:10.1093/mnras/stw3350. Retrieved 14 April 2024.

Bayer	α (Sadalmelik) β (Sadalsuud) γ (Sadachbia) δ (Skat) ε (Albali) ζ η θ (Ancha) ι κ (Situla) λ (Hydor) μ ν ξ (Bunda) ο π ρ σ τ τ υ φ χ ψ (91) ψ ψ ω ω A A b b b c c c d e f g g h i i i k α PsA C
Flamsteed	1 4 5 7 8 9 10 11 12 14 15 16 17 18 19 20 21 24 26 28 29 30 32 35 36 37 39 40 41 42 44 45 47 49 50 51 54 56 58 60 61 64 65 67 70 72 74 75 77 78 81 82 84 85 87 94 96 97 100
Variable	R U AE DV EP EW EZ FO HK IL HU IZ LL LP
HR	8017 8056 8121 8263 8363 8453 8500 8507 8581 8612 8629 8645 8716 8783 8836 8856 8879 8924 9014
HD	206610 (Bosona) 210277 212771 (Lionrock) 215152 219617 220466 220689 222093 222582
Other	2MASS J21392676+0220226 BD−22 5866 Gliese 849 K2-21 K2-28 K2-58 K2-72 K2-138 LS IV-14 116 Sneden's Star TRAPPIST-1 WASP-6 (Márohu) WASP-47 WASP-69 WASP-75

Exoplanets	ψ Aquarii b Gliese 849 b Gliese 876 b c d e HD 206610 b HD 210277 b HD 212771 b (Victoriapeak) HD 221416 b HD 222582 b K2-66b K2-72b c d e K2-138b TRAPPIST-1b c d e f g h WASP-6b

Star clusters	Messier 2 Messier 72 Messier 73

Nebulae	Helix Nebula Saturn Nebula

NGC	6975 7001 7010 7047 7051 7065 7069 7077 7081 7184 7222 7252 7257 7301 7302 7393 7492 7585 7592 7600 7606 7723 7727 7759
Other	Aquarius Dwarf ESO 603-G21 Lyman-alpha blob 1 PGC 1228197 PHL 293B SMM J2135-0102 WISE J224607.57−052635.0 J2345-0449

Galaxy clusters	Abell 2597 RXC J2211.7-0350 XMMXCS 2215-1738

Astronomical events	SN 2213-1745