NGC 2547
NGC 2547 is a southern open cluster in Vela, discovered by Nicolas Louis de Lacaille in 1751 from South Africa. The star cluster is young with an age of 20-30 million years.
| NGC 2547 | |
|---|---|
This image from the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESO's La Silla Observatory in Chile, shows the bright open star cluster NGC 2547. | |
| Observation data (J2000.0 epoch) | |
| Right ascension | 8h 09m 52.360s |
| Declination | −49° 10′ 35.01″ |
| Distance | 1.19 kly (364.0+46.8 −37.9 pc) |
| Apparent magnitude (V) | 4.7 |
| Apparent dimensions (V) | 20′ |
| Physical characteristics | |
| Mass | 201 M☉ |
| Radius | 2.61 ly |
| Estimated age | 37.7+5.7 −4.8 Myr |
| Other designations | NGC 2547, Cr 177, Mel 84, Dunlop 410, Lacaille III.2 |
| Associations | |
| Constellation | Vela |
Observations with the Spitzer Space Telescope showed a shell around the B3 III/IV-type star HD 68478. This could be a sign of recent mass loss in this star.
A study using Gaia DR2 data showed that NGC 2547 formed about 30 million years ago together with a new discovered star cluster, called [BBJ2018] 6. The star cluster NGC 2547 has a similar age compared with Trumpler 10, NGC 2451B, Collinder 135 and Collinder 140. It was suggested that all these clusters formed in a single event of triggered star formation.
NGC 2547 shows evidence for mass segregation down to 3 M☉.
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