Galaxy NGC 3675

NGC 3675
NGC 3675: Galaxy in Ursa Major; 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 160-80-80-80 min LRGB; Bernese Highlands; © 2017 Radek Chromik [32]


The galaxy was discovered by William Herschel on 14 January 1788 and listed as I 194. He noted: «Very bright, considerably large, much extended towards meridian, bright nucleus 6' long 2' broad chevelure.» [464] John Herschel listed the galaxy as h 887 and wrote on 12 April 1830: «very bright; large; much extended; very suddenly much brighter towards the middle; 2' long, 40" broad, Many stars 14 and 15 mag preceding.» [466] On 17 March 1849, George Johnstone Stoney (Lord Rosse's assistant) wrote: «Dark space following centre strongly suspected.» [486]

Physical Properties

NGC 3675 is a spiral galaxy of morphological type Sb with a fairly bright infrared nucleus. About 20 % of its total mass is in the nuclear bulge. The plane of the galaxy is inclined ~67° towards line of sight. [243] Published distance determinations since 2007 vary from 11 Mpc to 20 Mpc. [145]

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Designation NGC 3675
Type Gx (Sb)
Right Ascension (J2000.0) 11h 26m 08.1s
Declination (J2000.0) +43° 35' 11"
Diameter 5.9 × 3.1 arcmin
Photographic (blue) magnitude 11.0 mag
Visual magnitude 10.2 mag
Surface brightness 13.2 mag·arcmin-2
Position Angle 178°
Redshift (z) 0.002568
Distance derived from z 10.85 Mpc
Metric Distance 17.200 Mpc
Dreyer Description vB, cL, vmE 0° ±, vsmbMN, many st p
Identification, Remarks UGC 6439, MCG 7-24-4, CGCG 214-5

Finder Chart

The galaxy NGC 3675 is located in the constellation Ursa Maior. The constellation is circumpolar, but is highest at night from November to July, which is best for observing.

Finder Chart Galaxy NGC 3675
Galaxy NGC 3675 in constellation Ursa Maior. 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]

More Objects Nearby (±15°)


  • [32] Astrofotografie by Radek, Bernie and Dragan;
  • [145] SIMBAD astronomical database;
  • [149] SkySafari 6 Pro, Simulation Curriculum;
  • [160] The STScI Digitized Sky Survey;
  • [243] «Rotation properties of the infrared spiral galaxy NGC 3675» P. C. van der Kruit; Astrophysical Journal, Vol. 195, p. 611-615, February 1975; DOI:10.1086/153362; Bibcode:1975ApJ...195..611V
  • [277] «Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; (2021-02-17)
  • [464] «Catalogue of a second thousand of new nebulae and clusters of stars; with a few introductory remarks on the construction of the heavens» William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1789; DOI:10.1098/rstl.1789.0021
  • [466] «Observations of nebulæ and clusters of stars, made at Slough, with a twenty-feet reflector, between the years 1825 and 1833» John Frederick William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1833, Pages: 359-505; DOI:10.1098/rstl.1833.0021
  • [486] «On the construction of specula of six-feet aperture; and a selection from the observations of nebulæ made with them» William Parsons; Philosophical Transactions of the Royal Society of London, Volume 151, published 1 January 1861; DOI:10.1098/rstl.1861.0029