Peculiar galaxies 2019

[Ivan Maly]

January 4. 20" F/5. SQM 21.2, good seeing.




Arp 210, DSS


Arp 210, NGC 1569, Cam. HII.768, reobservation. 13 mm. Greatly extended WNW-ESE, with an elongated core greatly offset to the WNW end. 3 sharp knots along the major axis in the core. Galaxy extends faintly almost to the star ESE. Bright star with a fainter companion N of core.



Arp 52, SDSS


Arp 52, CGCG 421-27, Ori. 8 mm. Faint, small, extended NS with core offset to S [this matches the original blue plate] and NE edge enhanced. Core intermittent and occasionally resolved from a starlike knot (companion) within the halo to NNW. Double star 2.5' NW is partially resolved into a NS pair.



Arp 61, DSS


Arp 61, MCG+0-12-55, Eri. 8 mm. UGC 3105 ~6' E and MGC -53 >1' SW visible, respectively large and elongated and small and round. In -55, core immediately SE of faint star, elongated NW-SE and has an extension to NE of the star, which is offset NE from the major axis. Star of equal magnitude NW of the line between cores of -53 and -55. Star on the line intermittent. Starlike companion off the NW end of -55 similarly intermittent. Star inwards from it is invisible.



Arp 143, SDSS


Arp 143, NGC 2444-2445, Lyn. 8 mm. 2444 more prominent, compact ESE of star. Fainter and smaller compact core to SSE and seems to be involved in the same irregular halo. Faint star is embedded on the S edge of it. Two faint stars farther S. NS double enhancement E to ENE of core of -45. It is separated from core by a dark area. W side of the galaxy is brighter. Second double enhancement is W and NNW of core. S edge immediately W of the faint star is enhanced, ending in a faint compact knot on W side.



Arp 250, SDSS


Arp 250, 2 2MASX galaxies in Lynx. [Actually, PGC 21362 and 2063674.] Main component small, faint, elongated NE-SW, elongated core and faint intermittent extension SW. Threshold star WNW. Equidistant opposite is faint, compact companion, intermittent.



Arp 83, SDSS


Arp 83, NGC 3799-3800. Herschel object reobservation. Leo. 8 mm. 3800 strongly extended NE-SW. Semi-detached star cloud on NE end. NW edge is brighter along the extended core and continues slightly past it to the SW. NGC 3799 immediately farther SW. Compact, comma-shaped with the short tail curving SE and E.

[Ivan Maly]

February 9, 2019. CSSP, 20" F/4, SQM from 21.50 with thin crescent on horizon to 21.90 stable after midnight. Arps in W Hya area.



Arp 7, DSS

Arp 7, MCG-3-23-9. Hya. Visible in finder eyepiece (28 mm). In 8 mm, bright starlike core. Arm from W side CCW NW and N. Opposite arm is a straight segment pointing SE from E side of the core. NPM1G-160258 galaxy [PGC 8960068]: small, lies SSE. 5.5 mm: Three faint stars stretch in a line from N to E of core of MCG, middle one faintest. VV 28b is glimpsed as an incompletely resolved WNW, nebulous component of a pair with threshold star SE of the MCG core. Unequal double star SE of NPM1G is resolved, threshold component S.



Arp 257, SDSS

Arp 257, UGC 4638. Hya. 8 mm. Main component (MCG+0-23-5) elongated ESE-WNW. Faint star NNE. Companion or detached "clump" (MCG -6) is N of -5, half the distance to the star. Small, diffuse. In 5.5 mm, main component has a sharp, enhanced SE corner, but no additional details are seen.



Arp 275, DSS

Arp 275, NGC 2881. Hya. 5.5 mm. Overall elongated NW-SE, 2 stars E. Fainter star on S edge, intermittent star on SW edge. Dark lane bisects the galaxy, running NE from the last star. SE part (VV 293a) larger and somewhat brighter.



Arp 5, SDSS

Sextans area. Arp 5, NGC 3664, Leo. 5.5 mm. 3 stars of increasing brightness on a line SE. Main part of the galaxy greatly extended NE-SW and divided into the SW, long sub-part and NE, short sub-part. Faint stars close NE and SW. Extension from SW end of the main part to SE, ending in an intermittent knot.



Arp 44, SDSS

Arp 44, IC 609, Sex. [5.5 mm.] Main component slightly extended NE-SW and seems to have a core on the E side. Faint star S. Small secondary component N of it.



Arp 53 field, DSS

Arp 53, NGC 3290, Hya. 5.5 mm. Bright star N, on edge of field. Faint star NW, threshold stars closer NNW and NE. Main component extended slightly EW. Small companion NW, about 1/3 of the distance to the star.

[Howard B]

Wow, great night Ivan - wish I was there with you! Out of these objects I've only seen Arp 257 with a quality observation, and my sketch looks exactly like your description.

[Ivan Maly]

March 8, 2019. 20" (F/5). SQM 21.0, good seeing. Arps in E Cam area.



Arp 9, DSS


Arp 9, NGC 2523, Cam. NE of a star. 13 mm: Bar WNW-ESE, small bright core in the middle. Short arm from E end of the bar, weakly CCW to half the distance from the bar end to the star. Stronger arm opposite, slightly longer. 8 mm: Enhanced edge of the halo curving from near the end of the SE arm to W end of the bar. Detached small enhancement beyond the end of the N arm, at almost twice the distance from the bar end.



Arp 17, DSS


Arp 17, UGC 3972, Cam. 8 mm: Diffuse object between m11 and m14 stars (on a line SW-NE). 5.5 mm: Within the halo, main component (PGC 21693) comma-shaped, comprising the small core and the enhanced SW edge like a short arm from W side of the core. Secondary component (PGC 21685) glimpsed intermittently as an enhancement on the N edge of the halo.



Arp 80, DSS


Arp 80, NGC 2633, Cam. 5.5 mm. N of the line between 2 m10 stars (SW-NE). [Sub-] threshold star E. Bright NS core or bar with a starlike center. CW arm from S end of bar, runs parallel to the core on E side, widely separated. Opposite arm is just a short enhanced segment on NW edge of the halo. The long arm points in the general direction of, but does not connect to an enhancement N of the bar, which is widely separated and forms a right triangle with the nucleus and the subthreshold (visible as a diffuse spot) star to the E.



Arp 141, DSS


Arp 141, UGC 3730, Cam. 5.5 mm. Star SW, fainter star NW. Core on N end. S of it is an enhancement vaguely continued S from its W edge, to about half the distance to the star. Small enhancement SE of the first, another one ENE of the star.



Arp 156, SDSS


Arp 156, UGC 5814, Dra. 5.5 mm. E of the faintest (m12) star in a group of 4. Overall, elongated NW-SE. Core on NW end, NE edge flattened and sharp. An almost detached small star cloud SE of the core.



Arp 181, SDSS


Arp 181, NGC 3212 and 3215. Dra. H [III.980 and 981], reobservation. 5.5 mm. Pair stretching ESE of an unequal pair of stars. -12 elongated EW immediately S of a faint star. -15 has a faint star on E edge. It is mainly comma-shaped with the "tail" pointing N from the SW edge of the core. The core is also vaguely extended toward the star from its N edge.

[Ivan Maly]

June 30, 2019. Cherry Springs. Clear, transparency average, seeing average. SQM 21.5. 20" F/4. 2 remaining Arps in Ser area.





Arp 324, SDSS


Arp 324, UGC 10143 chain, VV 159. In Abell 2147. Her. Galaxy chain. Stretches across the 100 deg. field in 5.5 mm. W of a bright star. S-most member, nearest to the star (VV 159f) strongly elongated E-W, well defined. Next one to the N, VV 159c (MCG+3-4-51) is one of the two most prominent ones. It is round, with diffuse edges, and concentrated to the center. Component "d" is a small glow just E of a faint star. It is distinctly nonstellar and extended roughly NS (photographically, it is two starlike objects nearly in contact - III Zw 75). Component "b" to the N in the chain is a weaker version of "c". Star to the W has a threshold companion to its NE, which appears large and diffuse. VV 159e is difficult but can be glimpsed SSE of a star in the chain, S of "a" (UGC 10143). The latter, alongside "c", is one of the two most prominent galaxies in the chain. It is slightly elongated NS, and has diffuse edges and bright center.





Arp 328, SDSS


Arp 328, Hickson 72, VV 165, galaxy chain. Boo. 5.5 mm. Immediately noticeable as a group elongated NS to the W of a star; very bright star on edge of field. Hickson's "A" is a solitary companion N of the compact chain and S of a star. It is slightly elongated NW-SE. Component "B" on the N end of the compact chain is slightly elongated NS. It is almost touching "D" to the SE, which is extended NNW-SSE. Component "C" to the S is slightly extended NW-SE and is larger that either of the last two. Star to its SE is difficult and VV 165g between them is invisible. Then, after a while, in better clarity, the star, the small and faint "g", the star [actually, PGC 52847] NW of "C", and the similarly small and faint "E" to its NE are all seen quite well.