Sh2-304 is an emission nebula (H II region) in Canis Major
Sh2-304 (LBN 1049) is an emission nebula (H II region) in the constellation Canis Major . It is a telescope object, 6 inches or larger, and it is highest in the evening sky in February.
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.
Sh2-304 is Sh2-304 in the Sharpless catalog
Stewart Sharpless listed it in his catalog of H II regions (1959), drawn from the red and blue prints of the Palomar Sky Survey. He rated each region's brightness on a scale of 1 to 3; Sh2-304 is medium (class 2 of 3). It is also listed as LBN 1049.
Finding Sh2-304 from Sirius
Sirius
Sh2-304
CANIS MAJOR
Sh2-304 lies 7.4° south of Sirius , the magnitude -1.4 star. Three fingers held at arm's length cover about 5°.
Sh2-304 is highest in the evening in February
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
60°N
JAN at 60°N: 2° high at 9 pm FEB at 60°N: 6° high at 9 pm MAR at 60°N: 3° high at 9 pm APR at 60°N: -6° high at 9 pm MAY at 60°N: -19° high at 9 pm JUN at 60°N: -34° high at 9 pm JUL at 60°N: -48° high at 9 pm AUG at 60°N: -54° high at 9 pm SEP at 60°N: -49° high at 9 pm OCT at 60°N: -37° high at 9 pm NOV at 60°N: -21° high at 9 pm DEC at 60°N: -8° high at 9 pm 50°N
JAN at 50°N: 11° high at 9 pm FEB at 50°N: 16° high at 9 pm MAR at 50°N: 12° high at 9 pm APR at 50°N: 0° high at 9 pm MAY at 50°N: -16° high at 9 pm JUN at 50°N: -36° high at 9 pm JUL at 50°N: -54° high at 9 pm AUG at 50°N: -64° high at 9 pm SEP at 50°N: -56° high at 9 pm OCT at 50°N: -39° high at 9 pm NOV at 50°N: -19° high at 9 pm DEC at 50°N: -2° high at 9 pm 40°N
JAN at 40°N: 20° high at 9 pm FEB at 40°N: 26° high at 9 pm MAR at 40°N: 21° high at 9 pm APR at 40°N: 6° high at 9 pm MAY at 40°N: -13° high at 9 pm JUN at 40°N: -36° high at 9 pm JUL at 40°N: -58° high at 9 pm AUG at 40°N: -74° high at 9 pm SEP at 40°N: -61° high at 9 pm OCT at 40°N: -39° high at 9 pm NOV at 40°N: -16° high at 9 pm DEC at 40°N: 4° high at 9 pm 30°N
JAN at 30°N: 28° high at 9 pm FEB at 30°N: 36° high at 9 pm MAR at 30°N: 30° high at 9 pm APR at 30°N: 13° high at 9 pm MAY at 30°N: -9° high at 9 pm JUN at 30°N: -35° high at 9 pm JUL at 30°N: -60° high at 9 pm AUG at 30°N: -84° high at 9 pm SEP at 30°N: -64° high at 9 pm OCT at 30°N: -39° high at 9 pm NOV at 30°N: -13° high at 9 pm DEC at 30°N: 10° high at 9 pm 20°N
JAN at 20°N: 36° high at 9 pm FEB at 20°N: 46° high at 9 pm MAR at 20°N: 39° high at 9 pm APR at 20°N: 19° high at 9 pm MAY at 20°N: -6° high at 9 pm JUN at 20°N: -33° high at 9 pm JUL at 20°N: -59° high at 9 pm AUG at 20°N: -85° high at 9 pm SEP at 20°N: -63° high at 9 pm OCT at 20°N: -37° high at 9 pm NOV at 20°N: -9° high at 9 pm DEC at 20°N: 15° high at 9 pm 10°N
JAN at 10°N: 44° high at 9 pm FEB at 10°N: 56° high at 9 pm MAR at 10°N: 47° high at 9 pm APR at 10°N: 24° high at 9 pm MAY at 10°N: -1° high at 9 pm JUN at 10°N: -29° high at 9 pm JUL at 10°N: -56° high at 9 pm AUG at 10°N: -76° high at 9 pm SEP at 10°N: -60° high at 9 pm OCT at 10°N: -33° high at 9 pm NOV at 10°N: -5° high at 9 pm DEC at 10°N: 21° high at 9 pm 0°
JAN at 0°: 51° high at 9 pm FEB at 0°: 66° high at 9 pm MAR at 0°: 54° high at 9 pm APR at 0°: 29° high at 9 pm MAY at 0°: 3° high at 9 pm JUN at 0°: -25° high at 9 pm JUL at 0°: -50° high at 9 pm AUG at 0°: -66° high at 9 pm SEP at 0°: -53° high at 9 pm OCT at 0°: -29° high at 9 pm NOV at 0°: -1° high at 9 pm DEC at 0°: 25° high at 9 pm 10°S
JAN at 10°S: 57° high at 9 pm FEB at 10°S: 76° high at 9 pm MAR at 10°S: 61° high at 9 pm APR at 10°S: 34° high at 9 pm MAY at 10°S: 7° high at 9 pm JUN at 10°S: -20° high at 9 pm JUL at 10°S: -43° high at 9 pm AUG at 10°S: -56° high at 9 pm SEP at 10°S: -46° high at 9 pm OCT at 10°S: -24° high at 9 pm NOV at 10°S: 3° high at 9 pm DEC at 10°S: 30° high at 9 pm 20°S
JAN at 20°S: 61° high at 9 pm FEB at 20°S: 86° high at 9 pm MAR at 20°S: 65° high at 9 pm APR at 20°S: 37° high at 9 pm MAY at 20°S: 11° high at 9 pm JUN at 20°S: -15° high at 9 pm JUL at 20°S: -36° high at 9 pm AUG at 20°S: -46° high at 9 pm SEP at 20°S: -38° high at 9 pm OCT at 20°S: -18° high at 9 pm NOV at 20°S: 7° high at 9 pm DEC at 20°S: 33° high at 9 pm 30°S
JAN at 30°S: 62° high at 9 pm FEB at 30°S: 84° high at 9 pm MAR at 30°S: 65° high at 9 pm APR at 30°S: 39° high at 9 pm MAY at 30°S: 14° high at 9 pm JUN at 30°S: -9° high at 9 pm JUL at 30°S: -27° high at 9 pm AUG at 30°S: -36° high at 9 pm SEP at 30°S: -29° high at 9 pm OCT at 30°S: -12° high at 9 pm NOV at 30°S: 11° high at 9 pm DEC at 30°S: 35° high at 9 pm 40°S
JAN at 40°S: 59° high at 9 pm FEB at 40°S: 74° high at 9 pm MAR at 40°S: 62° high at 9 pm APR at 40°S: 40° high at 9 pm MAY at 40°S: 17° high at 9 pm JUN at 40°S: -4° high at 9 pm JUL at 40°S: -19° high at 9 pm AUG at 40°S: -26° high at 9 pm SEP at 40°S: -21° high at 9 pm OCT at 40°S: -6° high at 9 pm NOV at 40°S: 14° high at 9 pm DEC at 40°S: 36° 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 66°N, and never sets south of 66°S.
The distance to Sh2-304 is not well measured
Objects within 6° of Sh2-304
Sh2-304 catalog data
Field Value
Designations LBN 1049 Type emission nebula (H II region) Constellation Canis Major Right ascension (J2000) 06h 43.0m Declination (J2000) -24° 08′ Best month February Best with Telescope Sharpless number Sh2-304 Sharpless brightness Medium (class 2 of 3)
