NGC 6644 is a planetary nebula in Sagittarius
NGC 6644 (ESO 522-033) is a planetary nebula in the constellation Sagittarius . It shines at magnitude 10.7 and spans 2″. It is a telescope object, 6 inches or larger, and it is highest in the evening sky in August.
Planetary nebula: a shell of gas thrown off by a dying Sun-like star and lit by the hot core left behind, which becomes a white dwarf. The name comes from their small, round, planet-like look in early telescopes.
Finding NGC 6644 from Kaus Borealis
Kaus Borealis
NGC 6644
SAGITTARIUS
NGC 6644 lies 1.1° east of Kaus Borealis , the magnitude 2.8 star. That is within one binocular field.
NGC 6644 is highest in the evening in August
JAN
FEB
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MAY
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JUL
AUG
SEP
OCT
NOV
DEC
60°N
JAN at 60°N: -50° high at 9 pm FEB at 60°N: -55° high at 9 pm MAR at 60°N: -50° high at 9 pm APR at 60°N: -36° high at 9 pm MAY at 60°N: -22° high at 9 pm JUN at 60°N: -8° high at 9 pm JUL at 60°N: 1° high at 9 pm AUG at 60°N: 5° high at 9 pm SEP at 60°N: 1° high at 9 pm OCT at 60°N: -8° high at 9 pm NOV at 60°N: -22° high at 9 pm DEC at 60°N: -37° high at 9 pm 50°N
JAN at 50°N: -57° high at 9 pm FEB at 50°N: -65° high at 9 pm MAR at 50°N: -56° high at 9 pm APR at 50°N: -38° high at 9 pm MAY at 50°N: -19° high at 9 pm JUN at 50°N: -2° high at 9 pm JUL at 50°N: 10° high at 9 pm AUG at 50°N: 15° high at 9 pm SEP at 50°N: 10° high at 9 pm OCT at 50°N: -2° high at 9 pm NOV at 50°N: -20° high at 9 pm DEC at 50°N: -38° high at 9 pm 40°N
JAN at 40°N: -62° high at 9 pm FEB at 40°N: -75° high at 9 pm MAR at 40°N: -61° high at 9 pm APR at 40°N: -38° high at 9 pm MAY at 40°N: -16° high at 9 pm JUN at 40°N: 4° high at 9 pm JUL at 40°N: 19° high at 9 pm AUG at 40°N: 25° high at 9 pm SEP at 40°N: 19° high at 9 pm OCT at 40°N: 4° high at 9 pm NOV at 40°N: -17° high at 9 pm DEC at 40°N: -39° high at 9 pm 30°N
JAN at 30°N: -64° high at 9 pm FEB at 30°N: -85° high at 9 pm MAR at 30°N: -63° high at 9 pm APR at 30°N: -37° high at 9 pm MAY at 30°N: -12° high at 9 pm JUN at 30°N: 11° high at 9 pm JUL at 30°N: 28° high at 9 pm AUG at 30°N: 35° high at 9 pm SEP at 30°N: 27° high at 9 pm OCT at 30°N: 10° high at 9 pm NOV at 30°N: -13° high at 9 pm DEC at 30°N: -38° high at 9 pm 20°N
JAN at 20°N: -63° high at 9 pm FEB at 20°N: -85° high at 9 pm MAR at 20°N: -62° high at 9 pm APR at 20°N: -35° high at 9 pm MAY at 20°N: -9° high at 9 pm JUN at 20°N: 16° high at 9 pm JUL at 20°N: 36° high at 9 pm AUG at 20°N: 45° high at 9 pm SEP at 20°N: 36° high at 9 pm OCT at 20°N: 16° high at 9 pm NOV at 20°N: -9° high at 9 pm DEC at 20°N: -35° high at 9 pm 10°N
JAN at 10°N: -59° high at 9 pm FEB at 10°N: -75° high at 9 pm MAR at 10°N: -58° high at 9 pm APR at 10°N: -31° high at 9 pm MAY at 10°N: -4° high at 9 pm JUN at 10°N: 22° high at 9 pm JUL at 10°N: 44° high at 9 pm AUG at 10°N: 55° high at 9 pm SEP at 10°N: 44° high at 9 pm OCT at 10°N: 21° high at 9 pm NOV at 10°N: -5° high at 9 pm DEC at 10°N: -32° high at 9 pm 0°
JAN at 0°: -53° high at 9 pm FEB at 0°: -65° high at 9 pm MAR at 0°: -52° high at 9 pm APR at 0°: -27° high at 9 pm MAY at 0°: -0° high at 9 pm JUN at 0°: 27° high at 9 pm JUL at 0°: 52° high at 9 pm AUG at 0°: 65° high at 9 pm SEP at 0°: 51° high at 9 pm OCT at 0°: 26° high at 9 pm NOV at 0°: -1° high at 9 pm DEC at 0°: -27° high at 9 pm 10°S
JAN at 10°S: -45° high at 9 pm FEB at 10°S: -55° high at 9 pm MAR at 10°S: -45° high at 9 pm APR at 10°S: -22° high at 9 pm MAY at 10°S: 4° high at 9 pm JUN at 10°S: 32° high at 9 pm JUL at 10°S: 58° high at 9 pm AUG at 10°S: 75° high at 9 pm SEP at 10°S: 57° high at 9 pm OCT at 10°S: 31° high at 9 pm NOV at 10°S: 3° high at 9 pm DEC at 10°S: -22° high at 9 pm 20°S
JAN at 20°S: -37° high at 9 pm FEB at 20°S: -45° high at 9 pm MAR at 20°S: -36° high at 9 pm APR at 20°S: -16° high at 9 pm MAY at 20°S: 8° high at 9 pm JUN at 20°S: 35° high at 9 pm JUL at 20°S: 62° high at 9 pm AUG at 20°S: 85° high at 9 pm SEP at 20°S: 61° high at 9 pm OCT at 20°S: 34° high at 9 pm NOV at 20°S: 7° high at 9 pm DEC at 20°S: -17° high at 9 pm 30°S
JAN at 30°S: -28° high at 9 pm FEB at 30°S: -35° high at 9 pm MAR at 30°S: -28° high at 9 pm APR at 30°S: -10° high at 9 pm MAY at 30°S: 12° high at 9 pm JUN at 30°S: 37° high at 9 pm JUL at 30°S: 63° high at 9 pm AUG at 30°S: 85° high at 9 pm SEP at 30°S: 62° high at 9 pm OCT at 30°S: 37° high at 9 pm NOV at 30°S: 11° high at 9 pm DEC at 30°S: -11° high at 9 pm 40°S
JAN at 40°S: -20° high at 9 pm FEB at 40°S: -25° high at 9 pm MAR at 40°S: -19° high at 9 pm APR at 40°S: -4° high at 9 pm MAY at 40°S: 16° high at 9 pm JUN at 40°S: 38° high at 9 pm JUL at 40°S: 61° high at 9 pm AUG at 40°S: 75° high at 9 pm SEP at 40°S: 60° high at 9 pm OCT at 40°S: 38° high at 9 pm NOV at 40°S: 15° high at 9 pm DEC at 40°S: -5° high at 9 pm
below horizon
low
20-40°
40-60°
overhead-ish
The chart gives its height above the horizon at 9 pm through the year, from 60°N to 40°S. It can be seen from the whole southern hemisphere and north to about 65°N, and never sets south of 65°S.
The distance to NGC 6644 is not well measured
No reliable distance has been measured for it yet.
Objects within 6° of NGC 6644
28 NGC and IC objects lie within 6°. The nearest that are brighter than magnitude 12.5 or have their own page:
NGC 6638, globular cluster, 31′ M22 Sagittarius Cluster, globular cluster, 1.5° NGC 6642, globular cluster, 1.7° M28 Messier 28, globular cluster, 1.8° NGC 6629, planetary nebula, 2.5° IC 4732, planetary nebula, 2.5° NGC 6583, open cluster, 4.9° NGC 6553, globular cluster, 5.3°
NGC 6644 catalog data
Field Value
Constellation Sagittarius Designations NGC 6644, ESO 522-033, IRAS 18295-2510, PN G008.3-07.3 Type planetary nebula Right ascension (J2000) 18h 32.6m Declination (J2000) -25° 08′ Magnitude 10.7 (B 12.0) Apparent size 2″ Radial velocity 194 km/s Central star HD 170839, magnitude 15.0 Best with Telescope Best month August Catalog page NGC 6501 to 7000
