NGC 6644 (PN)
Planetary Nebula in Sagittarius
| R.A. | Dec. | Size | Mag | SB | Cnt.St | Type | Distance | Chart |
|---|---|---|---|---|---|---|---|---|
| 18h 32m 35.4s | -25° 07′ 43.1″ | 0′′ | 10.7 | -- | -- | PN | -- | -- |
Source: POSS-2 UK Schmidt Red (STScI) | Field: 10′ × 10′
Background
NGC 6644 is a small, faint planetary nebula 10,000 light-years away in Sagittarius. Discovered by Edward Pickering in 1881; 12th magnitude and only a few arcseconds across.
My Observing Notes
25-cm (Meade 10-inch LX200, The Coffee Grinder): Lurks amidst the trio of globular clusters surrounding λ Sgr (M22, M28, NGC 6638) — too faint for definite identification at this aperture, but worth knowing it's there.(Friday, May 2025)
References
Charts
Ultra-wide view (~25° field)
Wide-field view with Telrad rings (4°, 2°, 0.5°)
Finderscope view (9×50 RACI, ~4.4° TFOV)
Eyepiece view — 35 mm Panoptic on 12-inch f/5 (1.6° TFOV)