Globular cluster · constellation Dor
NGC 1644
NGC 1644ESO 084-030
Catalogue data
- Right ascension
- 4h 37m 40.1s
- Declination
- -66° 11' 57"
- Size
- 1.8′ × 1.5′
- Position angle
- 150°
- Magnitude
- 12.9 (V)
- Surface brightness
- 22.60 mag/arcsec²(derived)
- Difficulty
- 3/5
- Suggested techniques
- LRGB, RGB, OSC
- Data source
- OpenNGC
One 2MASS source is centered 7 arcsec southwest of the cluster core.
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