NGC 7817 is a spiral galaxy in Pegasus, 95 million light-years away
NGC 7817 is a spiral galaxy in the constellation Pegasus , 95 million light-years away. It shines at magnitude 12.1 and spans 3.3′ × 44″ of sky, about 90,500 light-years across. It is faint: a 10-inch or larger telescope, or a camera, and it is highest in the evening sky in November.
Galaxy: a system of billions of stars, gas and dust held together by gravity, far outside the Milky Way. Spiral galaxies have a disk with arms; elliptical galaxies are smooth, round or oval swarms of older stars.
Finding NGC 7817 from Algenib
Algenib
NGC 7817
PEGASUS
NGC 7817 lies 6.0° north of Algenib , the magnitude 2.8 star. Three fingers held at arm's length cover about 5°.
NGC 7817 is highest in the evening in November
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60°N
JAN at 60°N: 29° high at 9 pm FEB at 60°N: 13° high at 9 pm MAR at 60°N: 2° high at 9 pm APR at 60°N: -7° high at 9 pm MAY at 60°N: -9° high at 9 pm JUN at 60°N: -4° high at 9 pm JUL at 60°N: 7° high at 9 pm AUG at 60°N: 22° high at 9 pm SEP at 60°N: 37° high at 9 pm OCT at 60°N: 48° high at 9 pm NOV at 60°N: 50° high at 9 pm DEC at 60°N: 43° high at 9 pm 50°N
JAN at 50°N: 29° high at 9 pm FEB at 50°N: 10° high at 9 pm MAR at 50°N: -5° high at 9 pm APR at 50°N: -16° high at 9 pm MAY at 50°N: -19° high at 9 pm JUN at 50°N: -12° high at 9 pm JUL at 50°N: 2° high at 9 pm AUG at 50°N: 21° high at 9 pm SEP at 50°N: 40° high at 9 pm OCT at 50°N: 56° high at 9 pm NOV at 50°N: 60° high at 9 pm DEC at 50°N: 48° high at 9 pm 40°N
JAN at 40°N: 29° high at 9 pm FEB at 40°N: 7° high at 9 pm MAR at 40°N: -12° high at 9 pm APR at 40°N: -26° high at 9 pm MAY at 40°N: -29° high at 9 pm JUN at 40°N: -20° high at 9 pm JUL at 40°N: -3° high at 9 pm AUG at 40°N: 19° high at 9 pm SEP at 40°N: 42° high at 9 pm OCT at 40°N: 63° high at 9 pm NOV at 40°N: 70° high at 9 pm DEC at 40°N: 53° high at 9 pm 30°N
JAN at 30°N: 28° high at 9 pm FEB at 30°N: 3° high at 9 pm MAR at 30°N: -18° high at 9 pm APR at 30°N: -35° high at 9 pm MAY at 30°N: -39° high at 9 pm JUN at 30°N: -28° high at 9 pm JUL at 30°N: -8° high at 9 pm AUG at 30°N: 16° high at 9 pm SEP at 30°N: 43° high at 9 pm OCT at 30°N: 68° high at 9 pm NOV at 30°N: 78° high at 9 pm DEC at 30°N: 55° high at 9 pm 20°N
JAN at 20°N: 26° high at 9 pm FEB at 20°N: -1° high at 9 pm MAR at 20°N: -24° high at 9 pm APR at 20°N: -44° high at 9 pm MAY at 20°N: -49° high at 9 pm JUN at 20°N: -35° high at 9 pm JUL at 20°N: -13° high at 9 pm AUG at 20°N: 14° high at 9 pm SEP at 20°N: 42° high at 9 pm OCT at 20°N: 69° high at 9 pm NOV at 20°N: 82° high at 9 pm DEC at 20°N: 55° high at 9 pm 10°N
JAN at 10°N: 23° high at 9 pm FEB at 10°N: -5° high at 9 pm MAR at 10°N: -29° high at 9 pm APR at 10°N: -52° high at 9 pm MAY at 10°N: -59° high at 9 pm JUN at 10°N: -42° high at 9 pm JUL at 10°N: -17° high at 9 pm AUG at 10°N: 11° high at 9 pm SEP at 10°N: 39° high at 9 pm OCT at 10°N: 66° high at 9 pm NOV at 10°N: 77° high at 9 pm DEC at 10°N: 52° high at 9 pm 0°
JAN at 0°: 20° high at 9 pm FEB at 0°: -9° high at 9 pm MAR at 0°: -34° high at 9 pm APR at 0°: -60° high at 9 pm MAY at 0°: -68° high at 9 pm JUN at 0°: -48° high at 9 pm JUL at 0°: -21° high at 9 pm AUG at 0°: 7° high at 9 pm SEP at 0°: 35° high at 9 pm OCT at 0°: 60° high at 9 pm NOV at 0°: 68° high at 9 pm DEC at 0°: 48° high at 9 pm 10°S
JAN at 10°S: 16° high at 9 pm FEB at 10°S: -12° high at 9 pm MAR at 10°S: -38° high at 9 pm APR at 10°S: -66° high at 9 pm MAY at 10°S: -77° high at 9 pm JUN at 10°S: -52° high at 9 pm JUL at 10°S: -25° high at 9 pm AUG at 10°S: 3° high at 9 pm SEP at 10°S: 30° high at 9 pm OCT at 10°S: 52° high at 9 pm NOV at 10°S: 58° high at 9 pm DEC at 10°S: 42° high at 9 pm 20°S
JAN at 20°S: 12° high at 9 pm FEB at 20°S: -15° high at 9 pm MAR at 20°S: -40° high at 9 pm APR at 20°S: -69° high at 9 pm MAY at 20°S: -84° high at 9 pm JUN at 20°S: -55° high at 9 pm JUL at 20°S: -28° high at 9 pm AUG at 20°S: -0° high at 9 pm SEP at 20°S: 25° high at 9 pm OCT at 20°S: 44° high at 9 pm NOV at 20°S: 48° high at 9 pm DEC at 20°S: 35° high at 9 pm 30°S
JAN at 30°S: 7° high at 9 pm FEB at 30°S: -18° high at 9 pm MAR at 30°S: -41° high at 9 pm APR at 30°S: -68° high at 9 pm MAY at 30°S: -79° high at 9 pm JUN at 30°S: -55° high at 9 pm JUL at 30°S: -30° high at 9 pm AUG at 30°S: -4° high at 9 pm SEP at 30°S: 19° high at 9 pm OCT at 30°S: 35° high at 9 pm NOV at 30°S: 39° high at 9 pm DEC at 30°S: 28° high at 9 pm 40°S
JAN at 40°S: 2° high at 9 pm FEB at 40°S: -20° high at 9 pm MAR at 40°S: -41° high at 9 pm APR at 40°S: -63° high at 9 pm MAY at 40°S: -70° high at 9 pm JUN at 40°S: -53° high at 9 pm JUL at 40°S: -31° high at 9 pm AUG at 40°S: -8° high at 9 pm SEP at 40°S: 12° high at 9 pm OCT at 40°S: 26° high at 9 pm NOV at 40°S: 29° high at 9 pm DEC at 40°S: 20° 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 69°S, and never sets north of 69°N.
NGC 7817 is 95 million light-years away
The light seen from NGC 7817 tonight left it about 95 million years ago, long before modern humans existed. Distance source: Cosmicflows-4 (Tully et al. 2023).
Objects within 6° of NGC 7817
53 NGC and IC objects lie within 6°. The nearest that are brighter than magnitude 12.5 or have their own page:
NGC 7798, barred spiral galaxy, 1.1° NGC 7771, early spiral galaxy, 3.0° NGC 7769, spiral galaxy, 3.1° NGC 80, lenticular galaxy, 4.3° NGC 57, elliptical galaxy, 4.4° NGC 83, elliptical galaxy, 4.4° NGC 90, mixed spiral galaxy, 4.5° NGC 93, early spiral galaxy, 4.5°
NGC 7817 catalog data
Field Value
Constellation Pegasus Designations NGC 7817, 2MASX J00035889+2045084, IRAS 00014+2028, MCG +03-01-021, PGC 000279, UGC 00019 Type spiral galaxy (Sbc) Right ascension (J2000) 00h 04.0m Declination (J2000) +20° 45′ Magnitude 12.1 (B 12.0) Surface brightness 23.0 mag/arcmin² Apparent size 3.3′ × 44″ Position angle 46° True size 90,500 light-years Distance 95 million light-years (Cosmicflows-4 (Tully et al. 2023)) Radial velocity 2,299 km/s, redshift 0.00769 Best with Large telescope Best month November Catalog page NGC 7501 to 8000
