Spiral Galaxies NGC 7537 and NGC 7541
Supernova 1998dh

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The red shift of both galaxies is about the same, and gives a distance estimate for the pair of 140 million light years (Hubble Constant of 62 Km/sec per Mpc) and a diameter of 94,000 light years for NGC 7537 and 145,000 light years for NGC 7541. Although both galaxies are spirals, there is uncertainty about their exact classification. NGC 7541 has a strong asymmetry along the two semi-major axes, thin asymmetric arms, and a compact bulge. Astronomers have reported a strong radio source in the spiral arm that contains the supernova in the pictures above. The Kopernik image also has two much more distant anonymous background galaxies.

Supernova 1998dh is a type Ia discovered on July 20th, 1998 before it reached maximum light. A month later the Kopernik image catches it at about 14th magnitude.

NGC 7537 Magnitude: 13.7 Constellation: Pisces RA: 23h 14m 34.7s Dec: +04d 29' 53" Epoch 2000 Size (mins): 2.3 x 0.6 Classification: Sabc: II:                         Spiral Galaxy, (uncertain)

NGC 7541 Magnitude: 12.6 Constellation: Pisces RA: 23h 14m 42.9s Dec: +04d 32' 04" Epoch 2000 Size (mins): 3.5 x 1.2 Classification: SB(rs)bc: pec                       Barred Spiral, (uncertain), -                     Mixed Inner Ring - S-shaped, -                     with pecularities

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George Normandin, KAS

August 20th, 1998