IC 4997 is a planetary nebula in Sagitta
IC 4997 (PK 58-10 1) is a planetary nebula in the constellation Sagitta . It shines at magnitude 10.5 and spans 2″. It is a telescope object, 6 inches or larger, and it is highest in the evening sky in September.
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 4997 from Altair
Altair
IC 4997
SAGITTA
IC 4997 lies 10.6° northeast of Altair , the magnitude 0.8 star. A fist held at arm's length covers about 10°.
IC 4997 is highest in the evening in September
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
60°N
JAN at 60°N: -1° high at 9 pm FEB at 60°N: -11° high at 9 pm MAR at 60°N: -13° high at 9 pm APR at 60°N: -9° high at 9 pm MAY at 60°N: 2° high at 9 pm JUN at 60°N: 16° high at 9 pm JUL at 60°N: 31° high at 9 pm AUG at 60°N: 43° high at 9 pm SEP at 60°N: 47° high at 9 pm OCT at 60°N: 40° high at 9 pm NOV at 60°N: 27° high at 9 pm DEC at 60°N: 13° high at 9 pm 50°N
JAN at 50°N: -7° high at 9 pm FEB at 50°N: -20° high at 9 pm MAR at 50°N: -23° high at 9 pm APR at 50°N: -17° high at 9 pm MAY at 50°N: -3° high at 9 pm JUN at 50°N: 15° high at 9 pm JUL at 50°N: 34° high at 9 pm AUG at 50°N: 50° high at 9 pm SEP at 50°N: 57° high at 9 pm OCT at 50°N: 47° high at 9 pm NOV at 50°N: 29° high at 9 pm DEC at 50°N: 10° high at 9 pm 40°N
JAN at 40°N: -13° high at 9 pm FEB at 40°N: -29° high at 9 pm MAR at 40°N: -33° high at 9 pm APR at 40°N: -25° high at 9 pm MAY at 40°N: -9° high at 9 pm JUN at 40°N: 13° high at 9 pm JUL at 40°N: 36° high at 9 pm AUG at 40°N: 57° high at 9 pm SEP at 40°N: 66° high at 9 pm OCT at 40°N: 53° high at 9 pm NOV at 40°N: 30° high at 9 pm DEC at 40°N: 8° high at 9 pm 30°N
JAN at 30°N: -19° high at 9 pm FEB at 30°N: -37° high at 9 pm MAR at 30°N: -43° high at 9 pm APR at 30°N: -33° high at 9 pm MAY at 30°N: -14° high at 9 pm JUN at 30°N: 11° high at 9 pm JUL at 30°N: 37° high at 9 pm AUG at 30°N: 62° high at 9 pm SEP at 30°N: 76° high at 9 pm OCT at 30°N: 57° high at 9 pm NOV at 30°N: 30° high at 9 pm DEC at 30°N: 5° high at 9 pm 20°N
JAN at 20°N: -24° high at 9 pm FEB at 20°N: -46° high at 9 pm MAR at 20°N: -53° high at 9 pm APR at 20°N: -41° high at 9 pm MAY at 20°N: -18° high at 9 pm JUN at 20°N: 9° high at 9 pm JUL at 20°N: 36° high at 9 pm AUG at 20°N: 65° high at 9 pm SEP at 20°N: 85° high at 9 pm OCT at 20°N: 58° high at 9 pm NOV at 20°N: 29° high at 9 pm DEC at 20°N: 2° high at 9 pm 10°N
JAN at 10°N: -29° high at 9 pm FEB at 10°N: -54° high at 9 pm MAR at 10°N: -63° high at 9 pm APR at 10°N: -48° high at 9 pm MAY at 10°N: -22° high at 9 pm JUN at 10°N: 6° high at 9 pm JUL at 10°N: 34° high at 9 pm AUG at 10°N: 63° high at 9 pm SEP at 10°N: 82° high at 9 pm OCT at 10°N: 57° high at 9 pm NOV at 10°N: 27° high at 9 pm DEC at 10°N: -1° high at 9 pm 0°
JAN at 0°: -33° high at 9 pm FEB at 0°: -60° high at 9 pm MAR at 0°: -73° high at 9 pm APR at 0°: -53° high at 9 pm MAY at 0°: -26° high at 9 pm JUN at 0°: 3° high at 9 pm JUL at 0°: 31° high at 9 pm AUG at 0°: 59° high at 9 pm SEP at 0°: 73° high at 9 pm OCT at 0°: 53° high at 9 pm NOV at 0°: 25° high at 9 pm DEC at 0°: -4° high at 9 pm 10°S
JAN at 10°S: -36° high at 9 pm FEB at 10°S: -65° high at 9 pm MAR at 10°S: -83° high at 9 pm APR at 10°S: -57° high at 9 pm MAY at 10°S: -29° high at 9 pm JUN at 10°S: 0° high at 9 pm JUL at 10°S: 28° high at 9 pm AUG at 10°S: 53° high at 9 pm SEP at 10°S: 63° high at 9 pm OCT at 10°S: 47° high at 9 pm NOV at 10°S: 21° high at 9 pm DEC at 10°S: -6° high at 9 pm 20°S
JAN at 20°S: -37° high at 9 pm FEB at 20°S: -66° high at 9 pm MAR at 20°S: -86° high at 9 pm APR at 20°S: -58° high at 9 pm MAY at 20°S: -31° high at 9 pm JUN at 20°S: -3° high at 9 pm JUL at 20°S: 23° high at 9 pm AUG at 20°S: 45° high at 9 pm SEP at 20°S: 53° high at 9 pm OCT at 20°S: 41° high at 9 pm NOV at 20°S: 17° high at 9 pm DEC at 20°S: -9° high at 9 pm 30°S
JAN at 30°S: -38° high at 9 pm FEB at 30°S: -64° high at 9 pm MAR at 30°S: -77° high at 9 pm APR at 30°S: -57° high at 9 pm MAY at 30°S: -32° high at 9 pm JUN at 30°S: -5° high at 9 pm JUL at 30°S: 18° high at 9 pm AUG at 30°S: 37° high at 9 pm SEP at 30°S: 43° high at 9 pm OCT at 30°S: 33° high at 9 pm NOV at 30°S: 13° high at 9 pm DEC at 30°S: -11° high at 9 pm 40°S
JAN at 40°S: -37° high at 9 pm FEB at 40°S: -58° high at 9 pm MAR at 40°S: -67° high at 9 pm APR at 40°S: -53° high at 9 pm MAY at 40°S: -31° high at 9 pm JUN at 40°S: -8° high at 9 pm JUL at 40°S: 12° high at 9 pm AUG at 40°S: 28° high at 9 pm SEP at 40°S: 33° high at 9 pm OCT at 40°S: 25° high at 9 pm NOV at 40°S: 8° high at 9 pm DEC at 40°S: -13° 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 northern hemisphere and south to about 73°S, and never sets north of 73°N.
The distance to IC 4997 is not well measured
No reliable distance has been measured for it yet.
Objects within 6° of IC 4997
9 NGC and IC objects lie within 6°. The nearest that are brighter than magnitude 12.5 or have their own page:
IC 4997 catalog data
Field Value
Constellation Sagitta Designations IC 4997, PK 58-10 1, IRAS 20178+1634, PN G058.3-10.9, TYC 1631-1785-1 Type planetary nebula Right ascension (J2000) 20h 20.1m Declination (J2000) +16° 44′ Magnitude 10.5 (B 11.0) Apparent size 2″ Radial velocity -64 km/s Central star HD 193538, magnitude 14.0 Best with Telescope Best month September Catalog page IC 4501 to 5000
