NGC 7840

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NGC 7840
2MASX J00070878+0822598, PGC 1345780[3]

NGC 7840, the last numerical entry in the

light-years), and its diameter is about 162,000 light-years.[4] It was discovered by German astronomer Albert Marth on 29 November 1864.[1]

For observing from Earth's surface, it has a magnitude of 15.5 in the early 21st century.[5] One observing guide recommended a telescope with a least 300mm aperture for observations.[5]

See also

NGC 7840 (2MASS)

References

  1. ^ a b c d e Celestial Atlas, "NGC Object 7840", Courtney Seligman, March 2010 (accessed 2010-10-27)
  2. ^ WikiSky, "NGC 7840" (accessed 2010-10-17)
  3. ^ a b c "Search specification: NGC 7840". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-02-12.
  4. ^ "NASA/IPAC Extragalactic Database". Results for NGC 7840. Retrieved 3 August 2024.
  5. ^
    ISBN 9781441917775
    .
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