NGC 166

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NGC 166
NGC 166 DECam.png
DECam image of NGC 166
Observation data (J2000 epoch)
Constellation Cetus
Right ascension 00h 35m 48.8s [1]
Declination −13° 36 38 [1]
Redshift 0.020084 [1]
Apparent magnitude  (V)15.18 [1]
Characteristics
Type Sa [2]
Apparent size  (V)0.9' × 0.3' [1]
Other designations
PGC 2143. [1]

NGC 166 (also known as PGC 2143) is a spiral galaxy located around 2.6 million light-years away in the constellation Cetus, with an apparent magnitude of 15.18. [1] It was discovered by Francis Preserved Leavenworth in 1886. [3]

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NGC 747 is a spiral galaxy located in the constellation Cetus. Its speed relative to the cosmic microwave background is 5,100 ± 19 km/s, which corresponds to a Hubble distance of 75.2 ± 5.3 Mpc. NGC 747 was discovered by American astronomer Francis Leavenworth in 1886. The luminosity class of NGC 747 is II and it has a broad HI line. To date, four non-redshift measurements yield a distance of 83.900 ± 4.166 Mpc, which is within the Hubble distance range. Note, however, that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 747 could be approximately 23 .9 kpc. In the same area of the sky there are, among other things: the galaxies NGC 713, NGC 731, NGC 755 and NGC 767.

References

  1. 1 2 3 4 5 6 7 "NASA/IPAC Extragalactic Database". Results for NGC 0166. Retrieved 2016-09-02.
  2. "Search specification: NGC 166". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-02-18.
  3. Beal, William O. (1929). "Francis Preserved Leavenworth". Popular Astronomy. 37: 117. Bibcode:1929PA.....37..117B . Retrieved 2 September 2016.