LBN 421 is an emission nebula in Cygnus, 12,300 light-years away
LBN 421 is an emission nebula in the constellation Cygnus , 12,300 light-years away. Lynds rated it brightness class 4 of 6, moderately faint, and color class 3, reddish. It spans 30′ × 12′ of sky, about 108 light-years across. It is a faint target for long-exposure photography, and it is highest in the evening sky in October.
Emission nebula: a cloud of gas, mostly hydrogen, made to glow by the ultraviolet light of hot young stars. It shines in the red light of hydrogen-alpha, and a nebula filter helps it stand out from the sky.
Finding LBN 421 from Deneb
Deneb
LBN 421
CYGNUS
LBN 421 lies 10.4° northeast of Deneb , the magnitude 1.3 star. A fist held at arm's length covers about 10°.
LBN 421 is highest in the evening in October
JAN
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OCT
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60°N
JAN at 60°N: 35° high at 9 pm FEB at 60°N: 26° high at 9 pm MAR at 60°N: 21° high at 9 pm APR at 60°N: 21° high at 9 pm MAY at 60°N: 26° high at 9 pm JUN at 60°N: 35° high at 9 pm JUL at 60°N: 48° high at 9 pm AUG at 60°N: 63° high at 9 pm SEP at 60°N: 77° high at 9 pm OCT at 60°N: 77° high at 9 pm NOV at 60°N: 63° high at 9 pm DEC at 60°N: 49° high at 9 pm 50°N
JAN at 50°N: 29° high at 9 pm FEB at 50°N: 17° high at 9 pm MAR at 50°N: 11° high at 9 pm APR at 50°N: 11° high at 9 pm MAY at 50°N: 17° high at 9 pm JUN at 50°N: 29° high at 9 pm JUL at 50°N: 44° high at 9 pm AUG at 50°N: 61° high at 9 pm SEP at 50°N: 80° high at 9 pm OCT at 50°N: 81° high at 9 pm NOV at 50°N: 61° high at 9 pm DEC at 50°N: 44° high at 9 pm 40°N
JAN at 40°N: 21° high at 9 pm FEB at 40°N: 8° high at 9 pm MAR at 40°N: 1° high at 9 pm APR at 40°N: 1° high at 9 pm MAY at 40°N: 8° high at 9 pm JUN at 40°N: 21° high at 9 pm JUL at 40°N: 38° high at 9 pm AUG at 40°N: 57° high at 9 pm SEP at 40°N: 75° high at 9 pm OCT at 40°N: 75° high at 9 pm NOV at 40°N: 57° high at 9 pm DEC at 40°N: 38° high at 9 pm 30°N
JAN at 30°N: 14° high at 9 pm FEB at 30°N: -1° high at 9 pm MAR at 30°N: -9° high at 9 pm APR at 30°N: -9° high at 9 pm MAY at 30°N: -1° high at 9 pm JUN at 30°N: 14° high at 9 pm JUL at 30°N: 31° high at 9 pm AUG at 30°N: 51° high at 9 pm SEP at 30°N: 67° high at 9 pm OCT at 30°N: 67° high at 9 pm NOV at 30°N: 51° high at 9 pm DEC at 30°N: 32° high at 9 pm 20°N
JAN at 20°N: 6° high at 9 pm FEB at 20°N: -10° high at 9 pm MAR at 20°N: -18° high at 9 pm APR at 20°N: -19° high at 9 pm MAY at 20°N: -10° high at 9 pm JUN at 20°N: 6° high at 9 pm JUL at 20°N: 24° high at 9 pm AUG at 20°N: 43° high at 9 pm SEP at 20°N: 58° high at 9 pm OCT at 20°N: 58° high at 9 pm NOV at 20°N: 43° high at 9 pm DEC at 20°N: 25° high at 9 pm 10°N
JAN at 10°N: -2° high at 9 pm FEB at 10°N: -19° high at 9 pm MAR at 10°N: -28° high at 9 pm APR at 10°N: -28° high at 9 pm MAY at 10°N: -19° high at 9 pm JUN at 10°N: -2° high at 9 pm JUL at 10°N: 17° high at 9 pm AUG at 10°N: 35° high at 9 pm SEP at 10°N: 48° high at 9 pm OCT at 10°N: 48° high at 9 pm NOV at 10°N: 35° high at 9 pm DEC at 10°N: 17° high at 9 pm 0°
JAN at 0°: -10° high at 9 pm FEB at 0°: -28° high at 9 pm MAR at 0°: -38° high at 9 pm APR at 0°: -38° high at 9 pm MAY at 0°: -27° high at 9 pm JUN at 0°: -10° high at 9 pm JUL at 0°: 9° high at 9 pm AUG at 0°: 27° high at 9 pm SEP at 0°: 38° high at 9 pm OCT at 0°: 38° high at 9 pm NOV at 0°: 27° high at 9 pm DEC at 0°: 10° high at 9 pm 10°S
JAN at 10°S: -18° high at 9 pm FEB at 10°S: -36° high at 9 pm MAR at 10°S: -48° high at 9 pm APR at 10°S: -48° high at 9 pm MAY at 10°S: -36° high at 9 pm JUN at 10°S: -18° high at 9 pm JUL at 10°S: 1° high at 9 pm AUG at 10°S: 18° high at 9 pm SEP at 10°S: 28° high at 9 pm OCT at 10°S: 28° high at 9 pm NOV at 10°S: 18° high at 9 pm DEC at 10°S: 2° high at 9 pm 20°S
JAN at 20°S: -25° high at 9 pm FEB at 20°S: -44° high at 9 pm MAR at 20°S: -57° high at 9 pm APR at 20°S: -58° high at 9 pm MAY at 20°S: -44° high at 9 pm JUN at 20°S: -25° high at 9 pm JUL at 20°S: -7° high at 9 pm AUG at 20°S: 9° high at 9 pm SEP at 20°S: 19° high at 9 pm OCT at 20°S: 19° high at 9 pm NOV at 20°S: 9° high at 9 pm DEC at 20°S: -6° high at 9 pm 30°S
JAN at 30°S: -32° high at 9 pm FEB at 30°S: -52° high at 9 pm MAR at 30°S: -66° high at 9 pm APR at 30°S: -67° high at 9 pm MAY at 30°S: -52° high at 9 pm JUN at 30°S: -32° high at 9 pm JUL at 30°S: -14° high at 9 pm AUG at 30°S: 0° high at 9 pm SEP at 30°S: 9° high at 9 pm OCT at 30°S: 9° high at 9 pm NOV at 30°S: 0° high at 9 pm DEC at 30°S: -14° high at 9 pm 40°S
JAN at 40°S: -39° high at 9 pm FEB at 40°S: -58° high at 9 pm MAR at 40°S: -75° high at 9 pm APR at 40°S: -76° high at 9 pm MAY at 40°S: -58° high at 9 pm JUN at 40°S: -39° high at 9 pm JUL at 40°S: -22° high at 9 pm AUG at 40°S: -9° high at 9 pm SEP at 40°S: -1° high at 9 pm OCT at 40°S: -1° high at 9 pm NOV at 40°S: -9° high at 9 pm DEC at 40°S: -21° 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 40°S, and never sets north of 40°N.
LBN 421 is 12,300 light-years away
The light seen from LBN 421 tonight left it about 12,300 years ago. Distance source: Sh2-124, spectrophotometric, Foster & Brunt 2015 (3.78 kpc).
8 Lynds bright nebulae and 55 Lynds dark nebulae lie within 5° of LBN 421
The nearest:
LDN 1048, dark nebula, 8′ LBN 423, emission nebula, 21′ LDN 1054, dark nebula, 31′ LBN 426, emission nebula, 49′ LDN 1059, dark nebula, 58′ LDN 1043, dark nebula, 1.2° LDN 1057, dark nebula, 1.5° LDN 1017, dark nebula, 1.7° LDN 1008, dark nebula, 1.9° LDN 1014, dark nebula, 1.9°
NGC and IC objects in the field that are brighter than magnitude 12.5 or have their own page:
LBN 421 catalog data
Field Value
Designations LBN 421 Constellation Cygnus Type emission nebula Right ascension (J2000) 21h 35.7m Declination (J2000) +50° 13′ Galactic longitude and latitude 94.08°, -1.36° Brightness class 4 of 6 (moderately faint) Color class 3 of 4 (reddish) Apparent size 30′ × 12′ True size 108 light-years Distance 12,300 light-years (Sh2-124, spectrophotometric, Foster & Brunt 2015 (3.78 kpc)) Best with Camera Best month October Catalog page LBN 1 to 500
