NGC 604
Sign in to saveH II region inside the Triangulum Galaxy
Key facts
- Right ascension
- 01 34 33.2
- Declination
- +30 ° 47 ′ 06 ″
- Distance
- 2,700,000 ly (840,000 pc )
- Apparent magnitude v
- +14.0
- Apparent dimensions v
- 1.93 ′ x 1.2 ′ arcmins
- Constellation
- Triangulum
- Radius
- 760 ly
- Notable features
- massive H II region , 3.5 million years old
via Wikipedia infobox
Wikidata facts
- Image
- Nursery of New Stars - GPN-2000-000972.jpg
Show 8 more facts
- Commons category
- NGC 604
- catalog code
- RX J0134.5+3047
- time of discovery or invention
- 1784-09-11
- Commons gallery
- NGC 604
- apparent magnitude
- 14
- absolute magnitude
- -13.8
- right ascension
- 23.63375
- declination
- 30.78361
Sources (1)
via Wikidata · CC0
~1 min read
Article
NGC 604 is an H II region inside the Triangulum Galaxy. It was discovered by William Herschel on September 11, 1784. It is among the largest H II regions in the Local Group of galaxies; at the galaxy's estimated distance of 2.7 million light-years, its longest diameter is roughly 1,520 light years (~460 parsecs), over 40 times the size of the visible portion of the Orion Nebula. It is over 6,300 times more luminous than the Orion Nebula, and if it were at the same distance it would outshine Venus. Its gas is ionized by a cluster of massive stars at its center with 200 stars of spectral type O and WR, a mass of 10 solar masses, and an age of 3.5 million years; however, unlike the Large Magellanic Cloud's Tarantula Nebula central cluster (R136), NGC 604's one is much less compact and more similar to a large stellar association.
NGC 604, shown using the Hubble Space Telescope and Chandra, shows the nebula in the visible light and X-Rays