IC 4732 is a planetary nebula in Sagittarius, 22,200 light-years away
IC 4732 (ESO 523-001) is a planetary nebula in the constellation Sagittarius , 22,200 light-years away. It shines at magnitude 12.1 and spans 4″ of sky, about 0.5 light-years across. It is faint: a 10-inch or larger telescope, or a camera, 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 IC 4732 from Kaus Borealis
Kaus Borealis
IC 4732
SAGITTARIUS
IC 4732 lies 3.1° northeast of Kaus Borealis , the magnitude 2.8 star. Three fingers held at arm's length cover about 5°.
IC 4732 is highest in the evening in August
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
60°N
JAN at 60°N: -48° high at 9 pm FEB at 60°N: -53° high at 9 pm MAR at 60°N: -47° high at 9 pm APR at 60°N: -34° high at 9 pm MAY at 60°N: -20° high at 9 pm JUN at 60°N: -6° high at 9 pm JUL at 60°N: 4° high at 9 pm AUG at 60°N: 7° high at 9 pm SEP at 60°N: 4° high at 9 pm OCT at 60°N: -6° high at 9 pm NOV at 60°N: -20° high at 9 pm DEC at 60°N: -34° high at 9 pm 50°N
JAN at 50°N: -55° high at 9 pm FEB at 50°N: -63° high at 9 pm MAR at 50°N: -54° high at 9 pm APR at 50°N: -36° high at 9 pm MAY at 50°N: -18° high at 9 pm JUN at 50°N: 0° high at 9 pm JUL at 50°N: 12° high at 9 pm AUG at 50°N: 17° high at 9 pm SEP at 50°N: 12° high at 9 pm OCT at 50°N: 0° high at 9 pm NOV at 50°N: -18° high at 9 pm DEC at 50°N: -36° high at 9 pm 40°N
JAN at 40°N: -60° high at 9 pm FEB at 40°N: -73° high at 9 pm MAR at 40°N: -60° high at 9 pm APR at 40°N: -37° high at 9 pm MAY at 40°N: -15° high at 9 pm JUN at 40°N: 6° high at 9 pm JUL at 40°N: 21° high at 9 pm AUG at 40°N: 27° high at 9 pm SEP at 40°N: 21° high at 9 pm OCT at 40°N: 6° high at 9 pm NOV at 40°N: -15° high at 9 pm DEC at 40°N: -37° high at 9 pm 30°N
JAN at 30°N: -63° high at 9 pm FEB at 30°N: -82° high at 9 pm MAR at 30°N: -63° high at 9 pm APR at 30°N: -36° high at 9 pm MAY at 30°N: -12° high at 9 pm JUN at 30°N: 12° high at 9 pm JUL at 30°N: 30° high at 9 pm AUG at 30°N: 37° high at 9 pm SEP at 30°N: 30° high at 9 pm OCT at 30°N: 12° high at 9 pm NOV at 30°N: -12° high at 9 pm DEC at 30°N: -37° high at 9 pm 20°N
JAN at 20°N: -63° high at 9 pm FEB at 20°N: -87° high at 9 pm MAR at 20°N: -63° high at 9 pm APR at 20°N: -35° high at 9 pm MAY at 20°N: -8° high at 9 pm JUN at 20°N: 18° high at 9 pm JUL at 20°N: 38° high at 9 pm AUG at 20°N: 47° high at 9 pm SEP at 20°N: 38° high at 9 pm OCT at 20°N: 17° high at 9 pm NOV at 20°N: -8° high at 9 pm DEC at 20°N: -35° high at 9 pm 10°N
JAN at 10°N: -60° high at 9 pm FEB at 10°N: -77° high at 9 pm MAR at 10°N: -59° high at 9 pm APR at 10°N: -32° high at 9 pm MAY at 10°N: -4° high at 9 pm JUN at 10°N: 23° high at 9 pm JUL at 10°N: 46° high at 9 pm AUG at 10°N: 57° high at 9 pm SEP at 10°N: 46° high at 9 pm OCT at 10°N: 23° 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°: -54° high at 9 pm FEB at 0°: -67° high at 9 pm MAR at 0°: -54° high at 9 pm APR at 0°: -28° high at 9 pm MAY at 0°: -1° high at 9 pm JUN at 0°: 27° high at 9 pm JUL at 0°: 53° high at 9 pm AUG at 0°: 67° high at 9 pm SEP at 0°: 53° high at 9 pm OCT at 0°: 27° high at 9 pm NOV at 0°: -1° high at 9 pm DEC at 0°: -28° high at 9 pm 10°S
JAN at 10°S: -47° high at 9 pm FEB at 10°S: -57° high at 9 pm MAR at 10°S: -47° high at 9 pm APR at 10°S: -23° high at 9 pm MAY at 10°S: 3° high at 9 pm JUN at 10°S: 31° high at 9 pm JUL at 10°S: 58° high at 9 pm AUG at 10°S: 77° high at 9 pm SEP at 10°S: 58° 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: -23° high at 9 pm 20°S
JAN at 20°S: -39° high at 9 pm FEB at 20°S: -47° high at 9 pm MAR at 20°S: -39° high at 9 pm APR at 20°S: -18° high at 9 pm MAY at 20°S: 7° high at 9 pm JUN at 20°S: 34° high at 9 pm JUL at 20°S: 62° high at 9 pm AUG at 20°S: 87° 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: -18° high at 9 pm 30°S
JAN at 30°S: -30° high at 9 pm FEB at 30°S: -37° high at 9 pm MAR at 30°S: -30° high at 9 pm APR at 30°S: -12° high at 9 pm MAY at 30°S: 11° high at 9 pm JUN at 30°S: 36° high at 9 pm JUL at 30°S: 62° high at 9 pm AUG at 30°S: 83° high at 9 pm SEP at 30°S: 62° high at 9 pm OCT at 30°S: 36° high at 9 pm NOV at 30°S: 11° high at 9 pm DEC at 30°S: -12° high at 9 pm 40°S
JAN at 40°S: -22° high at 9 pm FEB at 40°S: -27° high at 9 pm MAR at 40°S: -22° high at 9 pm APR at 40°S: -6° high at 9 pm MAY at 40°S: 14° high at 9 pm JUN at 40°S: 37° high at 9 pm JUL at 40°S: 59° high at 9 pm AUG at 40°S: 73° high at 9 pm SEP at 40°S: 59° high at 9 pm OCT at 40°S: 37° high at 9 pm NOV at 40°S: 14° high at 9 pm DEC at 40°S: -6° 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 67°N, and never sets south of 67°S.
IC 4732 is 22,200 light-years away
The light seen from IC 4732 tonight left it about 22,200 years ago. Distance source: Statistical distance, Stanghellini et al. 2008 (6801 pc).
Objects within 6° of IC 4732
33 NGC and IC objects lie within 6°. The nearest that are brighter than magnitude 12.5 or have their own page:
NGC 6642, globular cluster, 57′ M22 Sagittarius Cluster, globular cluster, 1.4° NGC 6629, planetary nebula, 2.0° NGC 6644, planetary nebula, 2.5° NGC 6638, globular cluster, 2.9° M28 Messier 28, globular cluster, 3.1° M25 Messier 25, open cluster, 3.6° NGC 6583, open cluster, 4.2°
IC 4732 catalog data
Field Value
Constellation Sagittarius Designations IC 4732, ESO 523-001, IRAS 18308-2241, PK 10-06 1, PN G010.7-06.4 Type planetary nebula Right ascension (J2000) 18h 33.9m Declination (J2000) -22° 39′ Magnitude 12.1 (B 13.0) Apparent size 4″ True size 0.5 light-years Distance 22,200 light-years (Statistical distance, Stanghellini et al. 2008 (6801 pc)) Radial velocity -141 km/s Central star HD 171131, magnitude 16.0 Best with Large telescope Best month August Catalog page IC 4501 to 5000
