Celestial Atlas
PGC 66000 - 66499 ←PGC Objects: PGC 66500 - 66999 Link for sharing this page on Facebook→ PGC 67000 - 67499
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Page last updated Sep 13, 2021
Working on Arp-Madore 2115-273

Arp-Madore 2115-273
(= ESO 464-031 = "PGC 67753456")

The designations above refer to the pair of galaxies; the ones below to the individual objects
(= PGC 66528 + PGC 66529)
An interacting pair of galaxies in
Capricornus (RA 21 18 21.6, Dec -27 20 50)
PGC 66528 = A magnitude 15(?) spiral galaxy (type Sa? pec) at RA 21 18 22.1, Dec -27 20 48
PGC 66529 = A magnitude 14.5(?) lenticular? spiral? galaxy (type Sa or S0? pec) at RA 21 18 21.5, Dec -27 20 52
Physical Information:
PGC 66528: LEDA B 15.65; NED Sa? pec, 3K Vr 10597 km/sec, z 0.0353473937776
PGC 66529: LEDA Sa?M, B 15.05, I 12.77, 3K Vr 11014 km/sec; NED S0? pec, 3K Vr 10817 km/sec, z 0.03519463247
ESO 464-031: LEDA 3K Vr 6262 km/sec (obviously something wrong); NED repeats info for PGC 66528
It is obvious that there is something wrong about the LEDA magnitudes, as 66528 is considerably brighter than 66529. NED lists both at mag 15, with no bandwidth, so better, but still wrong; need to see if there is any better reference
 This pair of galaxies is among those in the Arp-Madore Catalogue of Southern Peculiar Galaxies & Associations, and is listed as a member of Category 2: Interacting Doubles in an ASCII file that adds "Insteracting Double with Material," but there is no image of the pair in the Catalogue, and it is not included in the supposedly complete list of objects that are in the Catalogue.
Classification Note: This incomplete entry uses the classifications from LEDA/NED. The completed entry will include alterations based on the HST image of the pair.
DSS image of region near Arp-Madore 2115-273 (= PGC 66528 + PGC 66529)
Above, a 12 arcmin wide DSS image centered on the pair of interacting galaxies listed as AM 2115-273
Below, a 1.5 arcmin wide DSS image centered on the pair and material scattered by their interaction
DSS image of Arp-Madore 2115-273 (= PGC 66528 + PGC 66529) and the material scattered by the interacting galaxies
Below, a ? arcmin wide image of the pair (temporary placeholder)
(Image Credit NASA/ESA/STScI, Julianne Dalcanton (UW), Alyssa Pagan (STScI); orientation and sizing by Courtney Seligman)
HST image of Arp-Madore 2115-273 (= PGC 66528 + PGC 66529) more or less as originally published
Below, the image above enhanced to show fainter outer regions (temporary placeholder)
(Image Credit as above; enhancement of faint regions by Courtney Seligman)
HST image of Arp-Madore 2115-273 (= PGC 66528 + PGC 66529) enhanced to show faint material scattered by the interacting galaxies

PGC 66617
(= ESO 287-009)

A magnitude 13.7 spiral galaxy (type Scd: sp / E(d)7-8) in
Indus (RA 21 21 16.3, Dec -46 09 10)
Note About Classification: The type is taken from the Spitzer Survey of Stellar Structure in Galaxies. The colon after the "d" means that the classification is uncertain, partly because it's a "spindle" (an "edge-on" galaxy), as indicated by "sp". The "/ E(d)7-8" means that the galaxy is surrounded by a faint disklike elliptical extension, but "true" ellipticals rarely go beyond class E4 or 5, and in any case, the existence of that outer region does not change the fact that the galaxy is a spiral.
DSS image of region near spiral galaxy PGC 66617
Above, a 12 arcmin wide DSS image centered on PGC 66617

PGC 66812
(= ESO 342-050 = MCG -06-47-004)

A magnitude 12.3 spiral galaxy (type SA(s)bc) in
Grus (RA 21 28 15.1, Dec -37 51 41)
Note About Classification: The type is taken from the Spitzer Survey of Stellar Structure in Galaxies.
DSS image of region near spiral galaxy PGC 66812
Above, a 12 arcmin wide DSS image centered on PGC 66812

PGC 66985
(= ESO 287-037 = MCG -07-44-024)

A magnitude 13.5(?) spiral galaxy (type SAB(s)dm) in
Grus (RA 21 34 32.0, Dec -44 18 53)
Note About Classification: The type is taken from the Spitzer Survey of Stellar Structure in Galaxies.
DSS image of region near spiral galaxy PGC 66985
Above, a 12 arcmin wide DSS image centered on PGC 66985
Celestial Atlas
PGC 66000 - 66499 ←PGC Objects: PGC 66500 - 66999→ PGC 67000 - 67499