RCW 151 is an emission nebula (H II region) in Sagittarius
RCW 151 is an emission nebula (H II region) in the constellation Sagittarius . spans 1.7°. It is a telescope object, 6 inches or larger, and it is highest in the evening sky in August.
Nebula: a cloud of gas and dust. Emission nebulae glow on their own, lit by ultraviolet light from hot young stars; reflection nebulae shine by starlight scattered from dust; dark nebulae block the light behind them.
Finding RCW 151 from Kaus Borealis
Kaus Borealis
RCW 151
SAGITTARIUS
RCW 151 lies 5.7° northwest of Kaus Borealis , the magnitude 2.8 star. Three fingers held at arm's length cover about 5°.
RCW 151 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: -47° high at 9 pm FEB at 60°N: -50° high at 9 pm MAR at 60°N: -44° high at 9 pm APR at 60°N: -30° high at 9 pm MAY at 60°N: -16° high at 9 pm JUN at 60°N: -2° high at 9 pm JUL at 60°N: 7° high at 9 pm AUG at 60°N: 10° high at 9 pm SEP at 60°N: 5° 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: -35° high at 9 pm 50°N
JAN at 50°N: -55° high at 9 pm FEB at 50°N: -60° high at 9 pm MAR at 50°N: -50° high at 9 pm APR at 50°N: -32° high at 9 pm MAY at 50°N: -13° high at 9 pm JUN at 50°N: 4° high at 9 pm JUL at 50°N: 16° high at 9 pm AUG at 50°N: 19° high at 9 pm SEP at 50°N: 13° high at 9 pm OCT at 50°N: -0° high at 9 pm NOV at 50°N: -19° high at 9 pm DEC at 50°N: -38° high at 9 pm 40°N
JAN at 40°N: -61° high at 9 pm FEB at 40°N: -70° high at 9 pm MAR at 40°N: -55° high at 9 pm APR at 40°N: -32° high at 9 pm MAY at 40°N: -10° high at 9 pm JUN at 40°N: 10° high at 9 pm JUL at 40°N: 25° high at 9 pm AUG at 40°N: 29° high at 9 pm SEP at 40°N: 21° high at 9 pm OCT at 40°N: 5° 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: -66° high at 9 pm FEB at 30°N: -79° high at 9 pm MAR at 30°N: -58° high at 9 pm APR at 30°N: -32° high at 9 pm MAY at 30°N: -7° high at 9 pm JUN at 30°N: 16° high at 9 pm JUL at 30°N: 34° high at 9 pm AUG at 30°N: 39° high at 9 pm SEP at 30°N: 29° high at 9 pm OCT at 30°N: 10° high at 9 pm NOV at 30°N: -14° high at 9 pm DEC at 30°N: -39° high at 9 pm 20°N
JAN at 20°N: -67° high at 9 pm FEB at 20°N: -84° high at 9 pm MAR at 20°N: -59° high at 9 pm APR at 20°N: -30° high at 9 pm MAY at 20°N: -4° high at 9 pm JUN at 20°N: 22° high at 9 pm JUL at 20°N: 42° high at 9 pm AUG at 20°N: 49° high at 9 pm SEP at 20°N: 37° high at 9 pm OCT at 20°N: 15° high at 9 pm NOV at 20°N: -11° high at 9 pm DEC at 20°N: -38° high at 9 pm 10°N
JAN at 10°N: -64° high at 9 pm FEB at 10°N: -78° high at 9 pm MAR at 10°N: -56° high at 9 pm APR at 10°N: -28° high at 9 pm MAY at 10°N: -0° high at 9 pm JUN at 10°N: 27° high at 9 pm JUL at 10°N: 50° high at 9 pm AUG at 10°N: 59° high at 9 pm SEP at 10°N: 44° high at 9 pm OCT at 10°N: 20° high at 9 pm NOV at 10°N: -8° high at 9 pm DEC at 10°N: -36° high at 9 pm 0°
JAN at 0°: -58° high at 9 pm FEB at 0°: -69° high at 9 pm MAR at 0°: -51° high at 9 pm APR at 0°: -24° high at 9 pm MAY at 0°: 3° high at 9 pm JUN at 0°: 32° high at 9 pm JUL at 0°: 57° high at 9 pm AUG at 0°: 69° high at 9 pm SEP at 0°: 50° high at 9 pm OCT at 0°: 24° high at 9 pm NOV at 0°: -5° high at 9 pm DEC at 0°: -32° high at 9 pm 10°S
JAN at 10°S: -51° high at 9 pm FEB at 10°S: -59° high at 9 pm MAR at 10°S: -45° high at 9 pm APR at 10°S: -20° high at 9 pm MAY at 10°S: 7° high at 9 pm JUN at 10°S: 35° high at 9 pm JUL at 10°S: 63° high at 9 pm AUG at 10°S: 79° high at 9 pm SEP at 10°S: 55° high at 9 pm OCT at 10°S: 27° high at 9 pm NOV at 10°S: -1° high at 9 pm DEC at 10°S: -28° high at 9 pm 20°S
JAN at 20°S: -43° high at 9 pm FEB at 20°S: -49° high at 9 pm MAR at 20°S: -38° high at 9 pm APR at 20°S: -15° high at 9 pm MAY at 20°S: 10° high at 9 pm JUN at 20°S: 38° high at 9 pm JUL at 20°S: 65° high at 9 pm AUG at 20°S: 86° high at 9 pm SEP at 20°S: 57° high at 9 pm OCT at 20°S: 30° high at 9 pm NOV at 20°S: 2° high at 9 pm DEC at 20°S: -22° high at 9 pm 30°S
JAN at 30°S: -34° high at 9 pm FEB at 30°S: -39° high at 9 pm MAR at 30°S: -30° high at 9 pm APR at 30°S: -10° high at 9 pm MAY at 30°S: 13° high at 9 pm JUN at 30°S: 39° high at 9 pm JUL at 30°S: 65° high at 9 pm AUG at 30°S: 80° high at 9 pm SEP at 30°S: 57° high at 9 pm OCT at 30°S: 32° high at 9 pm NOV at 30°S: 6° high at 9 pm DEC at 30°S: -17° high at 9 pm 40°S
JAN at 40°S: -25° high at 9 pm FEB at 40°S: -29° high at 9 pm MAR at 40°S: -22° high at 9 pm APR at 40°S: -5° high at 9 pm MAY at 40°S: 16° high at 9 pm JUN at 40°S: 39° high at 9 pm JUL at 40°S: 60° high at 9 pm AUG at 40°S: 70° high at 9 pm SEP at 40°S: 54° high at 9 pm OCT at 40°S: 32° high at 9 pm NOV at 40°S: 9° high at 9 pm DEC at 40°S: -11° 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 70°N, and never sets south of 70°S.
The distance to RCW 151 is not well measured
Objects within 6° of RCW 151
RCW 153, emission nebula (H II region), 55′ NGC 6568, open cluster, 1.5° NGC 6583, open cluster, 1.7° M24 Small Sagittarius Star Cloud, cloud, 1.9° RCW 149, emission nebula (H II region), 2.6° RCW 150, emission nebula (H II region), 2.7° RCW 155, emission nebula (H II region), 2.9° RCW 156, emission nebula (H II region), 2.9°
RCW 151 catalog data
Field Value
Type emission nebula (H II region) Constellation Sagittarius Right ascension (J2000) 18h 16.5m Declination (J2000) -20° 24′ Apparent size 1.7° Best month August Best with Telescope RCW number RCW 151
