Galaxy IC-1468, Supernova 2000dk

Galaxies IC 1467 and IC 1468 - Supernova 2000dn

Galaxies IC 1468 & IC 1467, SN 2000dn; CCD image thru 20 inch
This is a 9 minute exposure with an ST-6 CCD camera thru Kopernik's 20-inch F/8.1 Ritchey Chretien Cassegrain telescope taken on October 23rd, 2000 at 1:30 UT.

Supernova 2000dn:

Discovered: September 27th, 2000, by the Lick Observatory Supernova Search Team.
Magnitude 17.9 at discovery, and about 18.3 in the Kopernik image.
Type Ia, discovered just before maximum light
S. Jha, et al, Harvard-Smithsonian Center for Astrophysics, report that the expansion velocity of the supernova is 10,800 km/s.

Follow this Link to a NASA Web site on supernovas. It has a very nice animation and a description of what these objects are.

IC 1467 and IC 1468 are small, dim 15th magnitude galaxies in Pisces. Based on red-shift data and the maximum brightness of the supernova, IC 1468 is over twice as far away as IC 1467.

Using the red shift data from the “NASA Extra-galactic Data Base(NED)”, (and a Hubble Constant of 62 Km per sec., per Megaparsec), one can calculate a rough distance estimate for the IC 1468, and SN 2000 dn, of about 500 million light years. This large distance estimate is supported by the fact that Type Ia supernova 2000dn appears so relatively dim at maximum brightness. IC 1467 is estimated to be 213 million light years away.

IC 1467

Magnitude: 15.5

Constellation: Pisces

RA: 23h 04m 50.5s

Dec: -03° 13' 42" Epoch 2000

Size (mins): 0.8' x 0.3'

Classification: (uncertain)

Dreyer description in the NGC:

"Faint, small, bi-nuclear."

IC 1468

Magnitude: 15.5

Constellation: Pisces

RA: 23h 05m 07.7s

Dec: -03° 12' 19" Epoch 2000

Size (mins): 1.3' x 0.8'

Classification: (R')SAB0+ pec:

Mixed Barred Non-barred Lenticular Galaxy, Pseudo outer ring, peculiar (uncertain)

Dreyer description in the NGC:

"Very faint, very small, irregular figure, abruptly brighter middle."

Click below to

George Normandin, KAS

October 24th, 2000