NGC 80 Galaxy Group & Arp 65

NGC 80
NGC 80: Galaxy group in Andromeda; 500 mm Cassegrain f=3625 mm f/7.2; SBIG STL11K; 6-3-3-3 min LRGB; Bernese Highlands; © 2014 Radek Chromik [32]

History

The brightest two galaxies in this group were discovered by John Herschel on 17 August 1828 using his 18.25 inch reflecting telescope at Slough, England. He cataloged his discoveries as h 16 and h 17. For h 16 (NGC 80) he noted: «faint; small; round; pretty suddenly brighter in the middle; 15" [diameter] .» For h 17 (NGC 83) he noted: «elliptical; perhaps bicentral; makes trapezium with three bright stars.» [466]

The galaxies NGC 90 and NGC 93 were discovered on 26 October 1854 by R. J. Mitchell. NGC 81 and NGC 85 were discovered on 15 November 1873 by Ralph Copeland. Both were using the giant 72 inch reflector from William Parsons, 3rd Earl of Rosse, at Birr Castle. The remaining galaxies of this group were discovered by the French astronomer Guillaume Bigourdan in October/November 1884. He was using the 12.4 inch refractor at Paris Observatory. IC 1542 was discovered on 20 November 1897 by the French astronomer Stephane Javelle. He was using the 30 inch refractor at the Nice Observatory [196, 277]

In Halton Arp's «Atlas of Peculiar Galaxies» from 1966 the two galaxies NGC 90 and NGC 93 are listed as Arp 65. He noted: «Position of open spiral. Components lie off projected ends of both spiral arms.» [199]

Physical Properties

According to HyperLeda the NGC 80 galaxy group counts 13 members which are gravitationally bound and have a mean heliocentric radial velocity of 5942 km/s. [134] At Simbad one finds for NGC 80 distances ranging from 73 Mpc to 76 Mpc. NGC 83 seems to be a bit further away with distances ranging from 80 Mpc to 84 Mpc. [145]

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Name RA Dec Type bMag vMag B-V SB Dim PA z D(z) MD Dreyer Description Identification, Remarks
NGC 79 00 21 02.8 +22 34 02 Gx (E-S0) 15.0 14.0 1.0 13.0 0.6 × 0.6 0.018296 77.28 vF, S, vlbM MCG 4-2-3; CGCG 479-3; NPM1G +22.0015
NGC 80 00 21 10.9 +22 21 28 Gx (E-S0) 13.1 12.1 1.0 13.2 1.6 × 1.6 0.019006 80.28 94.300 F, S, R, psbM h 16; GC 38; UGC 203; MCG 4-2-4; CGCG 479-6
NGC 81 00 21 13.2 +22 23 00 Gx (S) 16.5 15.7 0.8 11.3 0.2 × 0.1 84 0.020447 86.37 eeF, sp h 17 NPM1G +22.0016
NGC 83 00 21 22.6 +22 26 03 Gx (E0) 13.6 12.5 1.1 13.3 1.5 × 1.5 0.020771 87.74 94.300 E, biN, 3 B st nr h 17; GC 39; UGC 206; MCG 4-2-5; CGCG 479-8
NGC 84 00 21 21.2 +22 37 09 * eF, st & neb
NGC 85 00 21 25.5 +22 30 44 Gx (S0) 15.8 14.8 1.0 13.5 0.7 × 0.5 146 0.020694 87.41 eeF, cL, R GC 5095; NGC 85A; MCG 4-2-7; CGCG 479-9; NPM1G +22.0017
NGC 85 A 00 21 25.5 +22 30 44 dup 15.8 14.8 1.0 13.5 0.7 × 0.5 146 0.020694 87.41 eeF, cL, R GC 5095; NGC 85; MCG 4-2-7; CGCG 479-9; NPM1G +22.0017
NGC 85 B 00 21 29.1 +22 30 23 dup 15.5 14.7 0.8 13.1 0.9 × 0.3 129 0.019413 82.00 83.670 eeF, cL, R GC 5095; IC 1546; MCG 4-2-8; CGCG 479-10
NGC 86 00 21 28.6 +22 33 23 Gx (S?) 15.7 14.8 0.9 13.0 0.7 × 0.3 9 0.018650 78.78 88.830 eF, vS, lbM MCG 4-2-9; CGCG 479-11
NGC 90 00 21 51.6 +22 24 02 Gx (SBc) 14.5 13.7 0.8 14.0 1.9 × 0.8 132 0.017856 75.42 vF, lE GC 40=5096; UGC 208; MCG 4-2-11; CGCG 479-13; Arp 65
NGC 93 00 22 03.4 +22 24 32 Gx (Sb) 14.3 13.2 1.1 12.8 1.4 × 0.6 48 0.017946 75.80 91.120 vF, vS GC 42=5098; UGC 209; MCG 4-2-12; CGCG 479-15; Arp 65
NGC 94 1 00 22 13.6 +22 29 00 Gx (S0) 15.6 14.6 1.0 11.7 0.4 × 0.2 30 0.019604 82.81 eF, vS CGCG 479-17
NGC 94 2 00 22 13.8 +22 28 26 Gx (S0) 16.5 15.5 1.0 12.6 0.4 × 0.2 150 0.019523 82.46 eF, vS NPM1G +22.0020
NGC 96 00 22 17.8 +22 32 48 Gx (S0) 15.6 14.6 1.0 13.4 0.6 × 0.6 0.020631 87.14 vF, S, vlbM MCG 4-2-14
IC 1542 00 20 41.4 +22 35 34 Gx (S) 14.9 14.1 0.8 12.8 0.7 × 0.5 78 0.024524 103.5 F, dif, gbM MCG 4-2-1; CGCG 479-1

Finder Chart

The NGC 80 galaxy group is located in the constellation Andromeda on the eastern side of the rectangle of Pegasus.

Finder Chart NGC 80 Galaxy Group & Arp 65
NGC 80 Galaxy Group & Arp 65 in constellation Andromeda. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Objects Within a Radius of 15°

References