NGC 7769

Galaxy in the constellation Pegasus

NGC 7769
The spiral galaxy NGC 7769.
Observation data (J2000 epoch)
Constellation	Pegasus
Right ascension	23^h 51^m 03.97^s^[1]
Declination	+20° 09′ 01.5″^[1]
Redshift	0.014046^[1]
Heliocentric radial velocity	6580 ± 10 km/s^[1]
Distance	185.4 ± 13.0 Mly (56.85 ± 4.00 Mpc)^[1]
Apparent magnitude (V)	12.0^[1]
Characteristics
Type	(R)SA(rs)b^[1]
Size	~176,600 ly (54.14 kpc) (estimated)^[1]
Apparent size (V)	3.2' x 2.7'^[1]
Other designations
IRAS 23485+1952, 2MASX J23510396+2009014, UGC 12808, MCG +03-60-030, PGC 72615, CGCG 455-054^[1]

NGC 7769 is a spiral galaxy in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 3855 ± 25 km/s, which corresponds to a Hubble distance of 56.85 ± 4.00 Mpc (∼185 million light-years).^[1] It was discovered by German-British astronomer William Herschel on 18 September 1784.^[2]

NGC 7769, together with NGC 7770 and NGC 7771, forms the galaxy trio Holm 820.^[3] It also is listed as part of the five-member group LGG 483, also known as the NGC 7771 Group, which contains the 3 galaxies from Holm 820, NGC 7786, and UGC 12828.^[4]

NGC 7769 is a LINER galaxy, i.e. it has a type of nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized atoms is relatively weak.^[1]

Two supernovae have been observed in NGC 7769: SN 2019iex (type II, mag. 17.6)^[5] and SN 2024grb (type II, mag. 18.2).^[6]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l "NASA/IPAC Extragalactic Database". Results for NGC 7769. Retrieved 2 August 2024.
^ Celestial Atlas entry for NGC 7769. Retrieved 2 August 2024.
^ The Webb Deep-Sky Society entry for NGC 7771 Trio in Pegasus. Retrieved 2 August 2024.
^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
^ Transient Name Server entry for SN 2019iex. Retrieved 2 August 2024.
^ Transient Name Server entry for SN 2024grb. Retrieved 2 August 2024.

External links

Media related to NGC 7769 at Wikimedia Commons
NGC 7769 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Constellation of Pegasus

Stars

Bayer	α (Markab) β (Scheat) γ (Algenib) δ (Alpheratz) ε (Enif) ζ (Homam) η (Matar) θ (Biham) ι κ λ μ (Sadalbari) ν ξ ο π¹ π² ρ σ τ (Salm) υ (Alkarab) φ χ ψ
Flamsteed	1 2 3 4 5 7 9 11 12 13 14 15 16 17 18 19 20 21 23 25 28 30 31 32 33 34 35 36 37 38 39 40 41 45 51 (Helvetios) 52 55 56 57 58 59 60 61 63 64 65 66 67 69 70 71 72 73 74 75 76 77 78 79 80 82 83 85 86 87 23 Psc 34 Vul
Variable	R S U W Z RU RV RZ SV TW TY AG AQ AT AU AV AW BB BH BK BO BP BX BY DH DI DY EE EF EQ EZ GT GX HN HO HP HR HX II IK IM IP KT KU LL LO LS MS MT NV NZ OY PT V342 V343 V354 V363 V372 V376 V391
HR	19 49 8116 8219 8221 8231 8250 8257 8258 8274 8292 8325 8341 8348 8358 8359 8364 8372 8391 8397 8412 8415 8435 8441 8455 8456 8458 8460 8461 8466 8475 8482 8491 8503 8514 8543 8555 8564 8587 8604 8605 8608 8631 8638 8642 8737 8784 8788 8792 8824 8831 8833 8838 8839 8873 8922 8942 8953 8970 9039 9055 9078 9109
HD	434 204603 205011 205422 205603 206689 206793 208897 209709 210890 211076 213025 215549 215733 219196 219828 220288 220773 221170 221493 225292
Other	BD+14 4559 (Solaris) BD +17 4708 BD +28 4211 GD 246 Gl 829 Gl 880 HAT-P-8 NGC 8 NGC 18 NGC 30 PG 2131+066 PG 2303+243 PSR B2127+11C PSR B2303+30 Q2343-BX418 WASP-10 WASP-21 (Tangra) WASP-52 (Anadolu) WASP-59 WASP-60 (Morava) X2127+119 3C 454.3

Exoplanets	51 Pegasi b (Dimidium) WASP-10b BD+14 4559 b (Pirx) TOI-5678 b HD 209458 b HR 8799 b c d e

Star
clusters

Other	Balbinot 1 Messier 15

Nebulae

Other	Pease 1

Galaxies

NGC	1 2 9 14 15 16 22 23 26 41 42 52 7033 7034 7042 7043 7053 7056 7066 7068 7074 7085 7190 7217 7236 7237 7303 7312 7315 7317 7318 7319 7320 7320c 7331 7332 7427 7448 7454 7457 7466 7469 7479 7610 7619 7625 7673 7674 7678 7720 7726 7735 7741 7742 NGC 7752 NGC 7753 7767 7769 7773 7800 7814
Other	BX442 CTA-102 Einstein Cross Huchra's lens IC 5145 IC 5337 Markarian 335 Pegasus Dwarf Irregular Galaxy Pegasus Dwarf Spheroidal Galaxy Q2343-BX418