Q89807949
Sign in to savestar in the constellation Dorado
Astronomical data · SIMBAD
- Object type
- GlC
- Coordinates
- RA 76.0554° · Dec -66.4349°
via SIMBAD · CDS Strasbourg
Key facts
- Constellation
- Dorado
- Right ascension
- 05 04 13.300
- Declination
- −66 ° 26 ′ 05.47 ″
- Distance
- ~164 kly (50 kpc )
- Apparent magnitude v
- 9.7 (B band)
- Absolute magnitude
- −8.8
- Mass
- 13,500 +5,600, −3,700 M ☉
- Estimated age
- 30 or 40 Myr
- Notable features
- Rare young globular
via Wikipedia infobox
Wikidata facts
- Instance of
- galaxy
- Part of
- Large Magellanic Cloud
- Constellation
- Dorado
- Image
- Ngc1818a.jpg
Show 9 more facts
- right ascension
- 76.055417
- apparent magnitude
- 9.7
- catalog code
- [SL63] 201
- declination
- -66.4348528
- radial velocity
- 312.9
- epoch
- J2000.0
- discoverer or inventor
- James Dunlop
- time of discovery or invention
- 1826-08-03
- Commons category
- NGC 1818
Sources (1)
via Wikidata · CC0
~2 min read
Encyclopedic overview
NGC 1818 is a young globular cluster in the north-west part of the Large Magellanic Cloud, about 3.2 kpc from the center. It was discovered by Scottish astronomer James Dunlop in 1826, and has since been well studied.
The cluster has an estimated core radius of 2.67 pc and a 90% light radius of 13.83 pc, with a combined mass of around 13,500 times the mass of the Sun. Age estimates for the cluster range from 25 to 40 million years. Given this, most stars with a mass equal to the Sun or less are still on the pre-main-sequence. The average stellar metallicity – what astronomers term the abundance of elements with higher atomic number than helium – is −0.4, or about 10 ≈ 40% of the abundance in the Sun.
Excerpted from Wikipedia’s “Q89807949” article, available under the CC BY-SA 4.0 licence.