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IC 5350 - 5386 ← NGC Objects: NGC 1 - 49 → NGC 50 - 99
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Page last updated Aug 12, 2017

NGC 9 (= PGC 652)
Discovered (Sep 27, 1865) by Otto Struve
A magnitude 13.5 spiral galaxy (type SBab? pec) in Pegasus (RA 00 08 54.7, Dec +23 49 01)
Historical Identification: Per Dreyer, NGC 9 (= GC 5083, O Struve, 1860 RA 00 01 27, NPD 67 00) is "faint, round, 9th or 10th magnitude star to southeast". The position precesses to RA 00 08 39.1, Dec +23 46 46, but there is nothing there that is obviously identifiable as Struve's object. However, 15 seconds of time to the east and about 2 arcmin to the north, the galaxy listed above seems a reasonable candidate, and (per Corwin) Struve's measurement of the 9th magnitude star 6 arcmin east southeast of the galaxy (the bright star just below center on the left edge of the wide-field image below) makes the identification with that galaxy certain. (It is this identification of NGC 9 with PGC 652 that allows the identification of NGC 8 described in its entry.)
Historical Note: The NGC entry is identical to the entry for GC 5083 near the end of Dreyer's 1877 Supplement to the GC.
Physical Information: Based on a recessional velocity of 4530 km/sec (and H0 = 70 km/sec/Mpc), NGC 9 is about 210 million light years away, in fair agreement with redshift-independent distance estimates of 115 to 185 million light years. Given that and its apparent size of about 1.05 by 0.5 arcmin (from the images below), it is about 65 thousand light years across, but its actual size is as uncertain as its distance.
SDSS image of region near spiral galaxy NGC 9, also showing the double star listed as NGC 8
Above, a 12 arcmin wide SDSS image centered on NGC 9, also showing the double star listed as NGC 8
Below, a 1.4 arcmin wide SDSS image of the galaxy
SDSS image of spiral galaxy NGC 9

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IC 5350 - 5386 ← NGC Objects: NGC 1 - 49 → NGC 50 - 99