by Alvin Huey
Jane, Marsha and Shneor were there when I got there. No one arrived after me, so it was just the four of us enjoying the evening sky.
I continued my Arp Galaxy survey and observed every single Arp in Draco, namely Arps 30, 32, 38, 66, 81, 109, 124, 156, 181, 188, 207, 293, 310, 311, 329 and 330. Many are re-observations was they are NGC's.and I've seen most of them already earlier in my "career".but did not look at them with a 22", but rather a 16" or 12".
I’ll cut and paste from my logbook:
| Arp 30 |
|---|
| 22” f/4.1 (203, 294, 377 and 528x) — The core is considerably faint and round of about 45” in diameter. Slightly brighter center. The “heavy” arm appeared on the NW part and is very faint and elongated (2:1). Even surface brightness across it’s 45” long arm. A close double star (13.4 and 14.0 magnitude) lies 1’ NE of the core. A “blinding” 9.8 magnitude star lies just 1.6’ ENE of the core. I tried to keep it off the field at 528x attempting to see additional detail, but yielded none. |
| Arp 32 |
| 22” f/4.1 (203, 294, 377 and 528x) — This galaxy appeared as a considerably faint, thin 5:1 elongated, even surface brightness patch with an almost stellar nucleus. PA = 40. I did not see the brightening of the north arm, labeled as Anon 1712+59B. The position angle demonstrates that the entire galaxy was seen, but the actual “integral” shape was not discerned. A 12.7 magnitude star lies 2.7’ NNE and a 13.6 magnitude star lies 3’ SW. |
| Arp 38 |
| 22” f/4.1 (203, 294, 377 and 528x) — This Arp is a bright and round
patch. Some mottling is seen with averted vision with a faint stellar
core, otherwise even surface brightness throughout the halo.
Estimated size is about 2.0’ in diameter. The companion was seen intermittingly at 528x as a very small round “second” nucleus” on the north end. It is a little fainter than the nucleus. A 13.5 magnitude star lies 1.1’ WSW of the nucleus. The best thing is to try and keep the 8.2 magnitude star off the field, which lies just 4.1 WSW from the nucleus. |
| Arp 66 |
| 22” f/4.1 (203, 293, 377 and 528x) — This galaxy is a considerably
bright elongated (3:2) patch with a position angle of 160º. Its surface
is even throughout with a stellar core at the center. About 60” long.
The companion is a very small, very faint round stellaring on the north edge, lying about 30” due north of the stellar core. It is significantly fainter than the core. An interfering 9.9 magnitude star lies just 2.2’ NW of the core. |
| Arp 81 |
| 22” f/4.1 (203, 293, 377 and 528x) — The galaxy is a considerably bright elongated (3:1) smudge with an off-centered nucleus. The nucleus was slightly elongated and located about a third of the way from the NW end. A slightly brighter chunk was seen about 10” NW of the nucleus. NGC 6622 was a very small, considerably bright, slightly elongated patch…about the same surface brightness as the nucleus of NGC 6621, making the pair appear like a galaxy with a double nucleus. NGC 6621 is estimated to be about 1.5” long with a PA of 135º. NGC 6622 is about 20” long with the same positional angle as its parent galaxy. |
| Arp 109 |
| 22” f/4.1 (203, 293, 377 and 528x) — Four galaxies were immediately seen
arranged like an “L”.
UGC 10053 appeared as a considerably faint round smudge with a slightly brighter center. It is about 45” across. A 15th magnitude double star lies about 1’ WSW from the core. A blinding 7.5 magnitude star lies 4.5 due west and must be kept off the field. This galaxy marks the top of the “L”. MCG+12-15-18 shows a considerably faint, round smudge with a slightly brighter center. It is about the same size and brightness as UGC 10053, which lies 1.2’ WNW. MCG+12-15-20 — Considerably faint, 3:1 elongated even surface brightness patch. It is about 45” long with a position angle of 170º. An 11.1 magnitude star lies 38” SSW. This galaxy marks the corner of the “L”. MCG+12-15-18 lies 3.5’ WNW and IC 1146 lies 3.8’ SSW. IC 1146 is a considerably bright round patch with a stellar nucleus. This galaxy is about 90” across and lies on the end of the short arm of the “L”. A nice 13th and 15th magnitude double star lies 2.2’ north |
| Arp 124 |
| 22” f/4.1 (203, 293 and 377x) — NGC 6361 is a bright elongated patch (4:1) with a brighter elongated (3:1) and well defined nucleus. The halo is about 90” long and the nucleus is about 20” long. MCG+10-25-3 is a very small round galaxy that is almost stellar in appearance. Mistaken for a star on the first pass. It lies a little less than 2’ SW from the center and 1’ from the SW tip of NGC 6361. I did not see any attachment between the two galaxies. A 15th magnitude star lies less than 20” NW. |
| Arp 156 |
| 22” f/4.1 (203, 293 and 377x) — This Arp is a low surface brightness round smudge. Even surface brightness throughout its 45” diameter surface. A 12.3 magnitude star lies 1.1 SW. A “bright” 8.1 magnitude star lies 5.2’ SSE. This galaxy was tougher than expected, but moving the 8.1 mag star off the field made it a lot easier to see. |
| Arp 181 |
| 22” f/4.1 (203, 293, 377 and 528x) — NGC 3215 shows a considerably bright 2:1 elongated patch. Even surface brightness with a slightly stellar nucleus. It is 60” long smudge and positioned at 75º NGC 3212 is a considerably faint 5:2 elongated patch. Slightly smaller than NGC 3215. Gradually brighter center to a round nucleus. About 50 x 20” and positioned at 90º. A nice pair of 13.7 and 14.7 magnitude stars lies about 1’ NW. |
| Arp 188 |
| 22” f/4.1 (203, 293 and 377x) — UGC 10214 is a fairly large and lower
than expected surface brightness. It is about 2’ long, 3:1 elongated
positioned at 90º. The nucleus takes on a very thin streak that
stretches about 75% of the length of the halo. The faint streamer was
not seen. A very bright 8.0 magnitude star lies 6.8’ east.
MCG+9-26-54 is a considerably bright small round patch with a much brighter center. It is about 30” across and lies 4.2 SSW of UGC 10214. |
| Arp 207 |
| 22” f/4.1 (203, 293, 377 and 528x) — This galaxy is a very faint, thin, even surface brightness streak of about 45” long. It is positioned at 60º. A 13.6 magnitude star lies just west of the galaxy, appearing as a displaced nucleus about a third of the way from the NE end. |
| Arp 293 |
| 22” f/4.1 (203, 293, 377 and 528x) — NGC 6285 is a 4:1 thin streak of
about 2’ long. Its surface brightness is fairly high with an almost
stellar core in the middle. PA = 45º. This appears as a Seyfert
galaxy.
NGC 6286 is a considerably bright 2:1 elongated patch positioned at 110º. The nucleus gradually brightens towards the middle. A pair of 14th magnitude stars lies between the pair of galaxies. The galaxies are about 2.5’ apart and aligned with a PA of 135º. |
| Arp 310 and Arp 311 |
| 22” f/4.1 (203, 293, 377 and 528x) — A high power field shows both Arps
in the same field arranged like a triangle of three galaxies. Actually
two of the corners are very close pairs of galaxies.
Arp 310 — IC 1259 is a considerably bright very small round patch that
is merged with UGC 10869 which is a small considerably bright round
patch. UGC 10869 is about twice as big as its companion, IC 1259. A
15th magnitude star lies in the SE edge halo of UGC 10869, which is
about 45” across.
Arp 311 — IC 1258 is the bigger (?) on the west with a stellar nucleus. It is considerably bright round patch of about 45” across. Its companion (IC 1260?) is a considerably faint, extremely small round patch on the west edge. A 15th magnitude star is merged on the south end of the main galaxy. Kaz 140 is a small very faint round patch. Even surface brightness across its 20” diameter disk. |
| Arp 329 — |
| I did not re-observe this one as I already did many times. It is Hickson 55. |
| Arp 330 |
| 22” f/4.1 (203, 293, 377 and 528x) — Five galaxies are chained in a
rought N-S line and almost equally spaced. From top to bottom are
MCG+9-27-96, -96, -94, -92 and -91. They are roughly 45 to 60” apart.
I’ll list the galaxies in order of relative brightness. A 8.7 magnitude
star lies just 1.2’ ESE of the top member.
MCG+9-27-94 — Consderiably faint, very small round patch of about 20” diameter. It has a gradually brightening center. MCG+9-27-91 — Considerably faint, very small round patch, with a very slightly brighter center. About 20” across. MCG+9-27-92 — Considerably faint, very small round patch. About 15” diameter and even surface brightness throughout. MCG+9-27-96 — Very faint, extremely small round patch. About 10” across and even surface brightness. MCG+9-27-95 — Very faint, extremely small round patch. About 10” across and even surface brightness. A 16th magnitude star lies about 20” NE |
Posted on tac-sac Aug 28, 2005 13:16:54 PT
Converted by report.pm 1.2 Mar 07, 2006 20:07:19 PT