RCW 70 is a planetary nebula in Crux, 5,540 light-years away
RCW 70 (PN G302.6-00.9) is a planetary nebula in the constellation Crux , 5,540 light-years away. spans 1′ of sky, about 1.6 light-years across. It is a telescope object, 6 inches or larger, and it is highest in the evening sky in May.
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 RCW 70 from Acrux
Acrux
RCW 70
CRUX
RCW 70 lies 2.6° east of Acrux , the magnitude 0.8 star. Three fingers held at arm's length cover about 5°.
RCW 70 is highest in the evening in May
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60°N
JAN at 60°N: -64° high at 9 pm FEB at 60°N: -52° high at 9 pm MAR at 60°N: -43° high at 9 pm APR at 60°N: -36° high at 9 pm MAY at 60°N: -34° high at 9 pm JUN at 60°N: -35° high at 9 pm JUL at 60°N: -41° high at 9 pm AUG at 60°N: -50° high at 9 pm SEP at 60°N: -61° high at 9 pm OCT at 60°N: -74° high at 9 pm NOV at 60°N: -86° high at 9 pm DEC at 60°N: -77° high at 9 pm 50°N
JAN at 50°N: -57° high at 9 pm FEB at 50°N: -44° high at 9 pm MAR at 50°N: -34° high at 9 pm APR at 50°N: -27° high at 9 pm MAY at 50°N: -24° high at 9 pm JUN at 50°N: -26° high at 9 pm JUL at 50°N: -32° high at 9 pm AUG at 50°N: -42° high at 9 pm SEP at 50°N: -55° high at 9 pm OCT at 50°N: -68° high at 9 pm NOV at 50°N: -76° high at 9 pm DEC at 50°N: -70° high at 9 pm 40°N
JAN at 40°N: -49° high at 9 pm FEB at 40°N: -36° high at 9 pm MAR at 40°N: -26° high at 9 pm APR at 40°N: -17° high at 9 pm MAY at 40°N: -14° high at 9 pm JUN at 40°N: -16° high at 9 pm JUL at 40°N: -23° high at 9 pm AUG at 40°N: -34° high at 9 pm SEP at 40°N: -47° high at 9 pm OCT at 40°N: -59° high at 9 pm NOV at 40°N: -66° high at 9 pm DEC at 40°N: -62° high at 9 pm 30°N
JAN at 30°N: -41° high at 9 pm FEB at 30°N: -28° high at 9 pm MAR at 30°N: -16° high at 9 pm APR at 30°N: -8° high at 9 pm MAY at 30°N: -4° high at 9 pm JUN at 30°N: -6° high at 9 pm JUL at 30°N: -14° high at 9 pm AUG at 30°N: -25° high at 9 pm SEP at 30°N: -38° high at 9 pm OCT at 30°N: -50° high at 9 pm NOV at 30°N: -56° high at 9 pm DEC at 30°N: -52° high at 9 pm 20°N
JAN at 20°N: -32° high at 9 pm FEB at 20°N: -19° high at 9 pm MAR at 20°N: -7° high at 9 pm APR at 20°N: 2° high at 9 pm MAY at 20°N: 6° high at 9 pm JUN at 20°N: 4° high at 9 pm JUL at 20°N: -4° high at 9 pm AUG at 20°N: -16° high at 9 pm SEP at 20°N: -30° high at 9 pm OCT at 20°N: -41° high at 9 pm NOV at 20°N: -46° high at 9 pm DEC at 20°N: -43° high at 9 pm 10°N
JAN at 10°N: -23° high at 9 pm FEB at 10°N: -10° high at 9 pm MAR at 10°N: 2° high at 9 pm APR at 10°N: 12° high at 9 pm MAY at 10°N: 16° high at 9 pm JUN at 10°N: 14° high at 9 pm JUL at 10°N: 5° high at 9 pm AUG at 10°N: -7° high at 9 pm SEP at 10°N: -21° high at 9 pm OCT at 10°N: -31° high at 9 pm NOV at 10°N: -36° high at 9 pm DEC at 10°N: -33° high at 9 pm 0°
JAN at 0°: -14° high at 9 pm FEB at 0°: -1° high at 9 pm MAR at 0°: 11° high at 9 pm APR at 0°: 21° high at 9 pm MAY at 0°: 26° high at 9 pm JUN at 0°: 23° high at 9 pm JUL at 0°: 14° high at 9 pm AUG at 0°: 2° high at 9 pm SEP at 0°: -12° high at 9 pm OCT at 0°: -22° high at 9 pm NOV at 0°: -26° high at 9 pm DEC at 0°: -23° high at 9 pm 10°S
JAN at 10°S: -4° high at 9 pm FEB at 10°S: 8° high at 9 pm MAR at 10°S: 20° high at 9 pm APR at 10°S: 31° high at 9 pm MAY at 10°S: 36° high at 9 pm JUN at 10°S: 33° high at 9 pm JUL at 10°S: 24° high at 9 pm AUG at 10°S: 11° high at 9 pm SEP at 10°S: -2° high at 9 pm OCT at 10°S: -12° high at 9 pm NOV at 10°S: -16° high at 9 pm DEC at 10°S: -13° high at 9 pm 20°S
JAN at 20°S: 5° high at 9 pm FEB at 20°S: 17° high at 9 pm MAR at 20°S: 29° high at 9 pm APR at 20°S: 41° high at 9 pm MAY at 20°S: 46° high at 9 pm JUN at 20°S: 43° high at 9 pm JUL at 20°S: 33° high at 9 pm AUG at 20°S: 19° high at 9 pm SEP at 20°S: 7° high at 9 pm OCT at 20°S: -2° high at 9 pm NOV at 20°S: -6° high at 9 pm DEC at 20°S: -4° high at 9 pm 30°S
JAN at 30°S: 14° high at 9 pm FEB at 30°S: 26° high at 9 pm MAR at 30°S: 38° high at 9 pm APR at 30°S: 50° high at 9 pm MAY at 30°S: 56° high at 9 pm JUN at 30°S: 52° high at 9 pm JUL at 30°S: 42° high at 9 pm AUG at 30°S: 28° high at 9 pm SEP at 30°S: 16° high at 9 pm OCT at 30°S: 7° high at 9 pm NOV at 30°S: 4° high at 9 pm DEC at 30°S: 6° high at 9 pm 40°S
JAN at 40°S: 23° high at 9 pm FEB at 40°S: 34° high at 9 pm MAR at 40°S: 46° high at 9 pm APR at 40°S: 59° high at 9 pm MAY at 40°S: 66° high at 9 pm JUN at 40°S: 62° high at 9 pm JUL at 40°S: 50° high at 9 pm AUG at 40°S: 37° high at 9 pm SEP at 40°S: 25° high at 9 pm OCT at 40°S: 17° high at 9 pm NOV at 40°S: 14° high at 9 pm DEC at 40°S: 16° 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 26°N, and never sets south of 26°S.
RCW 70 is 5,540 light-years away
The light seen from RCW 70 tonight left it about 5,540 years ago. It ranks 25 of 47 by distance among the RCW nebulae with a measured distance. Distance source: Gaia extinction distance, Deng et al. 2025 (1700 pc).
Objects within 6° of RCW 70
C99 Coalsack Nebula, dark nebula, 58′ C98, open cluster, 1.1° RCW 69, planetary nebula, 1.4° RCW 68, emission nebula (H II region), 2.2° RCW 71, emission nebula (H II region), 2.3° RCW 67, emission nebula (H II region), 2.3° RCW 73, emission nebula (H II region), 2.5° RCW 66, emission nebula (H II region), 2.5°
RCW 70 catalog data
Field Value
Designations PN G302.6-00.9 Type planetary nebula Constellation Crux Right ascension (J2000) 12h 48.5m Declination (J2000) -63° 50′ Apparent size 1′ True size 1.6 light-years Distance 5,540 light-years (Gaia extinction distance, Deng et al. 2025 (1700 pc)) Best month May Best with Telescope RCW number RCW 70
