LBN 81 is an emission nebula in Scutum
LBN 81 is an emission nebula in the constellation Scutum . Lynds rated it brightness class 6 of 6, the faintest, and color class 4, the reddest, strongest on the red print. It spans 40′ × 15′ of sky. It is a faint target for long-exposure photography, and it is highest in the evening sky in August.
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 81 from η Ser
η Ser
LBN 81
SCUTUM
LBN 81 lies 5.2° southeast of η Ser , the magnitude 3.2 star. Three fingers held at arm's length cover about 5°.
LBN 81 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: -33° high at 9 pm FEB at 60°N: -37° high at 9 pm MAR at 60°N: -33° high at 9 pm APR at 60°N: -21° high at 9 pm MAY at 60°N: -6° high at 9 pm JUN at 60°N: 8° high at 9 pm JUL at 60°N: 19° high at 9 pm AUG at 60°N: 23° high at 9 pm SEP at 60°N: 19° high at 9 pm OCT at 60°N: 8° high at 9 pm NOV at 60°N: -6° high at 9 pm DEC at 60°N: -21° high at 9 pm 50°N
JAN at 50°N: -40° high at 9 pm FEB at 50°N: -47° high at 9 pm MAR at 50°N: -41° high at 9 pm APR at 50°N: -24° high at 9 pm MAY at 50°N: -6° high at 9 pm JUN at 50°N: 13° high at 9 pm JUL at 50°N: 27° high at 9 pm AUG at 50°N: 33° high at 9 pm SEP at 50°N: 27° high at 9 pm OCT at 50°N: 13° high at 9 pm NOV at 50°N: -6° high at 9 pm DEC at 50°N: -24° high at 9 pm 40°N
JAN at 40°N: -48° high at 9 pm FEB at 40°N: -57° high at 9 pm MAR at 40°N: -48° high at 9 pm APR at 40°N: -27° high at 9 pm MAY at 40°N: -5° high at 9 pm JUN at 40°N: 17° high at 9 pm JUL at 40°N: 35° high at 9 pm AUG at 40°N: 43° high at 9 pm SEP at 40°N: 35° high at 9 pm OCT at 40°N: 18° high at 9 pm NOV at 40°N: -5° high at 9 pm DEC at 40°N: -27° high at 9 pm 30°N
JAN at 30°N: -54° high at 9 pm FEB at 30°N: -67° high at 9 pm MAR at 30°N: -54° high at 9 pm APR at 30°N: -30° high at 9 pm MAY at 30°N: -4° high at 9 pm JUN at 30°N: 22° high at 9 pm JUL at 30°N: 43° high at 9 pm AUG at 30°N: 53° high at 9 pm SEP at 30°N: 43° high at 9 pm OCT at 30°N: 22° high at 9 pm NOV at 30°N: -4° high at 9 pm DEC at 30°N: -29° high at 9 pm 20°N
JAN at 20°N: -59° high at 9 pm FEB at 20°N: -77° high at 9 pm MAR at 20°N: -59° high at 9 pm APR at 20°N: -31° high at 9 pm MAY at 20°N: -3° high at 9 pm JUN at 20°N: 25° high at 9 pm JUL at 20°N: 50° high at 9 pm AUG at 20°N: 63° high at 9 pm SEP at 20°N: 50° high at 9 pm OCT at 20°N: 25° high at 9 pm NOV at 20°N: -3° high at 9 pm DEC at 20°N: -31° high at 9 pm 10°N
JAN at 10°N: -61° high at 9 pm FEB at 10°N: -87° high at 9 pm MAR at 10°N: -61° high at 9 pm APR at 10°N: -31° high at 9 pm MAY at 10°N: -2° high at 9 pm JUN at 10°N: 28° high at 9 pm JUL at 10°N: 55° high at 9 pm AUG at 10°N: 73° high at 9 pm SEP at 10°N: 55° high at 9 pm OCT at 10°N: 28° high at 9 pm NOV at 10°N: -2° high at 9 pm DEC at 10°N: -31° high at 9 pm 0°
JAN at 0°: -60° high at 9 pm FEB at 0°: -83° high at 9 pm MAR at 0°: -60° high at 9 pm APR at 0°: -30° high at 9 pm MAY at 0°: -1° high at 9 pm JUN at 0°: 30° high at 9 pm JUL at 0°: 59° high at 9 pm AUG at 0°: 83° high at 9 pm SEP at 0°: 59° high at 9 pm OCT at 0°: 30° high at 9 pm NOV at 0°: -1° high at 9 pm DEC at 0°: -30° high at 9 pm 10°S
JAN at 10°S: -56° high at 9 pm FEB at 10°S: -73° high at 9 pm MAR at 10°S: -57° high at 9 pm APR at 10°S: -28° high at 9 pm MAY at 10°S: 0° high at 9 pm JUN at 10°S: 30° high at 9 pm JUL at 10°S: 59° high at 9 pm AUG at 10°S: 87° high at 9 pm SEP at 10°S: 60° high at 9 pm OCT at 10°S: 31° 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: -51° high at 9 pm FEB at 20°S: -63° high at 9 pm MAR at 20°S: -51° high at 9 pm APR at 20°S: -26° high at 9 pm MAY at 20°S: 2° high at 9 pm JUN at 20°S: 30° high at 9 pm JUL at 20°S: 57° high at 9 pm AUG at 20°S: 77° high at 9 pm SEP at 20°S: 58° high at 9 pm OCT at 20°S: 31° high at 9 pm NOV at 20°S: 2° high at 9 pm DEC at 20°S: -25° high at 9 pm 30°S
JAN at 30°S: -44° high at 9 pm FEB at 30°S: -53° high at 9 pm MAR at 30°S: -44° high at 9 pm APR at 30°S: -22° high at 9 pm MAY at 30°S: 3° high at 9 pm JUN at 30°S: 29° high at 9 pm JUL at 30°S: 53° high at 9 pm AUG at 30°S: 67° high at 9 pm SEP at 30°S: 53° high at 9 pm OCT at 30°S: 29° high at 9 pm NOV at 30°S: 3° high at 9 pm DEC at 30°S: -22° high at 9 pm 40°S
JAN at 40°S: -36° high at 9 pm FEB at 40°S: -43° high at 9 pm MAR at 40°S: -36° high at 9 pm APR at 40°S: -18° high at 9 pm MAY at 40°S: 4° high at 9 pm JUN at 40°S: 27° high at 9 pm JUL at 40°S: 47° high at 9 pm AUG at 40°S: 57° high at 9 pm SEP at 40°S: 47° high at 9 pm OCT at 40°S: 27° high at 9 pm NOV at 40°S: 4° high at 9 pm DEC at 40°S: -18° 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 83°N.
The distance to LBN 81 is not well measured
No reliable distance has been measured for it yet.
13 Lynds bright nebulae and 79 Lynds dark nebulae lie within 5° of LBN 81
The nearest:
LDN 485, dark nebula, 30′ LBN 82, emission nebula, 34′ LDN 494, dark nebula, 43′ LBN 80, emission nebula, 54′ LDN 495, dark nebula, 1.1° LDN 497, dark nebula, 1.2° LDN 473, dark nebula, 1.3° LDN 463, dark nebula, 1.3° LDN 498, dark nebula, 1.3° LDN 484, dark nebula, 1.4°
NGC and IC objects in the field that are brighter than magnitude 12.5 or have their own page:
LBN 81 catalog data
Field Value
Designations LBN 81 Constellation Scutum Type emission nebula Right ascension (J2000) 18h 34.7m Declination (J2000) -06° 52′ Galactic longitude and latitude 24.91°, +0.57° Brightness class 6 of 6 (the faintest) Color class 4 of 4 (the reddest, strongest on the red print) Apparent size 40′ × 15′ Best with Camera Best month August Catalog page LBN 1 to 500
