Session Name: 200521
Observer: Sam
Site: 29 Quedo (Obs)
Started: Thursday, May 21, 2020 at 8:45 PM
Finished: Friday, May 22, 2020 at 12:00 AM
Seeing: 5. E – bright stars not twinkling
Transparency: 6 – All seven Little Dipper stars
Session Notes:
Goal: H400, Arps, a few PN
Fans on at 8:45 PM, ready to observe at 9:00 PM
Polaris/Arcturus alignment in 12.5mm: error -0.564
(Still not the kind of errors I would like to see.)
At 9:00 PM still too bright to observe.
Venus & Mercury near each low in W.
360 Clear.
11:45 PM call it quits. A very nice nice. Looking at sky have all little dipper stars
SQM-L @ 11:55. Measurements are weird and imprecise
Z – 20.35/21.06/21.34/21.08
E – 19.81/21.13
S – 21.28/21.26
W – 20.4/21.19
N – 21.12/20.6
Visually sky is not as nice as last night (20/21 May 20). MW still present but does not show quite as much structure. Blends into SF light dome. Spica, Arcturus are not twinkling, Antares some twinkling.
ID: NGC2903
Type: Galaxy; RA Dec: 093212+2130; Constellation: Leo
Name: SAC5279; Mag: 9
Date: Thursday, May 21, 2020 9:14:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Found: True; Telescope: Dob; Eyepiece: 6mm Ethos; Magnification: 353x
Observation Notes:
[Note: about 30 min before astronomical twilight]
26mm: gal. Sky still quite bright (pre astro twilight). very elongated. Suddenly brighter to center core. Significant extension.
13mm: line of brightness through nucleus – a bar – separate from halo surrounding gal.
8mm: Sky is steady (good seeing): pretty sharp focus that is steady. Elongated nucleus, bar, av showing structure in both arms: straight bar through center, with sickle-like arms coming off end of bar. Splendid!
6mm: Reasonably sharp stars and steady focus. Nucleus with long bar, sickles off end of bar. ~1/5 fov in long dimension using the sickles to demarc galaxy. Beautiful. Some evidence of structure in nucleus: illumination not quite uniform. Where attached to bar one sickle seems brighter than other. Orientation is NS; N sickle is brighter: this is NGC2905. N sickle points to W; S sickle to E.
ID: NGC2905
Type: Galaxy+DkNeb; RA Dec: 093236+2138; Constellation: Leo
Name: BD+222103; Mag: 11
Date: Thursday, May 21, 2020 9:30:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
See also NGC2903.
6mm: NGC2903 reasonably sharp stars and steady focus. Nucleus with long bar, sickles off end of bar. ~1/5 fov in long dimension using the sickles to demarc galaxy. Beautiful. Some evidence of structure in nucleus: illumination not quite uniform. Where attached to bar one sickle seems brighter than other. Orientation is NS; N sickle is brighter: this is NGC2905. N sickle points to W; S sickle to E.
ID: NGC2968
Type: Galaxy; RA Dec: 094312+3156; Constellation: Leo
Name: SAC5311; Mag: 11.7
Date: Thursday, May 21, 2020 9:30:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Observation Notes:
15 min prior to astro twilight w/NGC2964, NGC2970 26mm: Three gal in fov. Brightest gal to S is NGC2964 (11.3m); next to NNE is NGC2968 (11.7m) also elliptical, third possible further along (NNE of NNE) gal is NGC2970 (13.6m). NGC2964 is elliptical; NGC2968 also elliptical. Can’t estimate shape of NGC2970.
17mm: low surface brightness. gently brighter toward center. AV3 shows pointlike bright source in center. More elliptical than NGC2964.
13mm: SW/NE orientation
8mm: 8mm: NGC2964/8 separation is ~1/3 – 1/2 fov. No detail to NGC2968.
ID: NGC2964
Type: Galaxy; RA Dec: 094254+3150; Constellation: Leo
Name: I-114; Mag: 11.3
Date: Thursday, May 21, 2020 9:33:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Observation Notes:
15 min prior to astro twilight
w/NGC2968, NGC2970
26mm: Three gal in fov. Brightest gal to S is NGC2964 (11.3m); next to NNE is NGC2968 (11.7m), third possible further along (NNE of NNE) gal is NGC2970 (13.6m). NGC2964 is elliptical; NGC2968 also elliptical. Can’t estimate shape of NGC2970.
17mm: elliptical. gently brighter toward center. some halo blends into brighter, extended nucleus. AV3 shows brighter, stellar feature in nucleus.
13mm: WSW/ENE orientaiton
8mm: NGC2964/8 separation is ~1/3 – 1/2 fov. No detail to NGC2964.
ID: NGC2970
Type: Galaxy; RA Dec: 094330+3159; Constellation: Leo
Name: SAC5312; Mag: 13.6
Date: Thursday, May 21, 2020 9:30:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: False; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
15 min prior to astro twilight w/NGC2964, NGC2968 26mm: Three gal in fov. Brightest gal to S is NGC2964 (11.3m); next to NNE is NGC2968 (11.7m), third possible further along (NNE of NNE) gal is NGC2970 (13.6m). NGC2964 is elliptical; NGC2968 also elliptical. Can’t estimate shape of NGC2970. [ISDA shows NGC2970 as asterism?]
17mm: present
13mm: not seen.
ID: NGC5566
Type: Galaxy; RA Dec: 142020+0355; Constellation: Vir
Name: Arp286; Mag: 10.5
Date: Thursday, May 21, 2020 9:49:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
w/NGC5560
26mm: Two very close gal in fov. NGC5566 is brighter toward center, elliptical. NGC5560 is dimmer, uniform brightness edge-on or flat.
6mm: ~1/3 fov separates 5560/6.
ID: NGC5560
Type: Galaxy; RA Dec: 142004+0359; Constellation: Vir
Name: Arp286; Mag: 12.4
Date: Thursday, May 21, 2020 9:49:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
w/NGC5566
26mm: Two very close gal in fov. NGC5566 is elliptical, brighter toward center, elliptical. NGC5560 is dimmer, uniform brightness edge-on or flat.
8mm: elongated. Some evidence of brightening toward center. Perhaps some internal structure. Looks different than other edge-on gal. A bit boxy – long, flat rectangle appearance. Does taper.
6mm: gauzy. Faint, no ev brightening toward center, nucleus. ~1/3 fov separates NGC5560/6. Points ~ toward NGC5566.
ID: NGC4038
Type: Galaxy; RA Dec: 120152-1851; Constellation: Crv
Name: Arp244; Mag: 10.7
Date: Thursday, May 21, 2020 10:01:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Observation Notes:
w/NGC4039
26mm: resolve two gal, brighter fetus shape (NGC4038), dimmer umbilical feeding fetus (NGC4039). Irr. Brightening toward center fetus, distorted. Appearance of several pieces. Some additional, which I can’t discern well enough to describe.
8mm: Some evidence of stream or connection between NGC4039 to E end of NGC4038.
ID: NGC4039
Type: Galaxy; RA Dec: 120153-1853; Constellation: Crv
Name: Arp244; Mag: 10.3
Date: Thursday, May 21, 2020 10:01:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Observation Notes:
w/NGC4039
26mm: resolve two gal, brighter fetus shape (NGC4038), dimmer umbilical feeding fetus (NGC4039). Irr+elongated. Brightening toward “center”. Some structure, which I can’t discern well enough to describe.
8mm: Some evidence of stream or connection between NGC4039 to E end of NGC4038.
ID: NGC4027
Type: Galaxy; RA Dec: 115930-1915; Constellation: Crv
Name: Arp22; Mag: 11.2
Date: Thursday, May 21, 2020 10:13:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Observation Notes:
26mm: gal. Gauzy, gently brighter toward center. Not round. Nucleus does not appear aligned with gal ellipticity. Grainy appearance.
17mm: grainy. possibly some involved stars or bright pieces. strongly elliptical. nucleus orientation not aligned with halo ellipticity.
13mm: nucleus not centered in gal – is this two overlapping gal? Evidence of warp on brighter side NGC4027.
8mm: Either warped/twisted, or two gal. Orientation ~EW, brighter side to W which twists toward N. In this NW area is where a second gal, or bright area not aligned with EW orientation appears.
ID: PNG303.6+40.0
Type: P Neb; RA Dec: 125336-2252; Constellation: Hya
Name: SAC5125; Mag: 13.3
Date: Thursday, May 21, 2020 10:27:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Filter: LP-3 Oxygen III; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Filter: DGM NPB; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Filter: LP-3 Oxygen III; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Filter: DGM NPB; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Filter: LP-3 Oxygen III; Magnification: 265x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Filter: DGM NPB; Magnification: 265x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Filter: LP-3 Oxygen III; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Filter: DGM NPB; Magnification: 125x
Observation Notes:
26mm(+OIII, NPB): pn. One star looks like it might have some fuzz associated with it. Responds to both OIII, NPB, but better with OIII. With filter, nebulosity. PN adjacent to slightly dimmer field star: nebulosity is rather large and extends midway to adjacent field star.
13mm: every so slight hint nebulosity; however, probably wouldn’t have noted if had not previously identified.
13mm+OIII: responds, but very dim. nebulosity does not seem to extend as far.
13mm+NPB: nebulosity does not respond.
8mm(+OIII, NPB): Nothing evident
17mm: hint of nebulosity
17mm+OIII: nebulosity extends to neighboring star and beyond.
17mm+NPB: nebulosity does not respond as well, but still to and beyond neighboring star (to E or planetary)
ID: NGC3147
Type: Galaxy; RA Dec: 101653+7324; Constellation: Dra
Name: I-79; Mag: 10.7
Date: Thursday, May 21, 2020 10:41:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
26mm: gal. ell. faint. brighter toward center. sense nucleus elongated. Bright field star ~ > 1/3, < 1/2 fov away.
17mm: ell. brighter toward center in stages: gently brighter then suddenly brighter toward center.
13mm: not quite round to elliptical. Gently brighter, then brighter, then suddenly brighter toward center.
8mm: not quite round. Core is extended with stellar like central component. Nothing else in fov.
ID: NGC3489
Type: Galaxy; RA Dec: 110019+1354; Constellation: Leo
Name: II-101; Mag: 10.3
Date: Thursday, May 21, 2020 10:50:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
26mm: gal. small. strongly elliptical tending toward flat. suddenly brighter toward extended center.
17mm: same desc except a bit larger and sky a bit darker.
8mm: perhaps some evidence spiral structure.
13mm: same desc. Orientation E/W.
ID: NGC3593
Type: Galaxy; RA Dec: 111437+1249; Constellation: Leo
Name: I-29; Mag: 11
Date: Thursday, May 21, 2020 10:58:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
26mm: gal. small. strongly ell. gently brighter toward ell extended center. Nothing else evident in fov.
13mm: nucleus is very long and strongly elongated and halo is much larger than in 26mm. ~1/15-1/16 fov in long dimension. Orientation E/W or WSW/ENE.
ID: NGC3184
Type: Galaxy; RA Dec: 101817+4125; Constellation: UMa
Name: I-168; Mag: 10.4
Date: Thursday, May 21, 2020 11:04:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Found: True; Telescope: Dob; Eyepiece: 8mm Ethos; Magnification: 265x
Observation Notes:
26mm: very faint, very gauzy/ghostly/ethereal. No brightening toward center. Not quite round: possibly elliptical but may be Irr.
17mm: same desc. Adjacent to or involves a relatively faint field star in outer envelope.
13mm: still present but contrast with rest of field decreased. Very gently brighter toward center core inside halo.
8mm: still present, but mostly only the interior brightening toward center, but not envelope/halo.
At no point did I get a clear sense that shape was not quite round/elliptical vs. irr.
ID: NGC3198
Type: Galaxy; RA Dec: 101955+4533; Constellation: UMa
Name: I-199; Mag: 10.4
Date: Thursday, May 21, 2020 11:11:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
26mm: gal. Very low sb, gauzy. Strongly ell. No brightening toward center. Nothing else in fov.
13mm: gauzy. strongly ell. ~1/8 – 1/10 fov. NE/SW orientation.
ID: NGC4236
Type: Galaxy; RA Dec: 121642+6928; Constellation: Dra
Name: SAC3789; Mag: 9.6
Date: Thursday, May 21, 2020 11:17:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Found: True; Telescope: Dob; Eyepiece: 17mm Ethos; Magnification: 125x
Found: True; Telescope: Dob; Eyepiece: 13mm Ethos; Magnification: 163x
Observation Notes:
26mm: gal. very large, very low sb. almost av: may be av1. Large: 1/3 fov. No brightening toward center. May be flat.
17mm: ~1/3 fov. Very ethereal, strongly elliptical (possibly flat).
13mm: Orientation is hard: high dec means low drift velocity. Estimate NW/SE orientation
ID: NGC3751
Type: Galaxy; RA Dec: 113754+2156; Constellation: Leo
Name: Arp320; Mag: 13.9
Date: Thursday, May 21, 2020 11:24:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
FOV shows “paddle” asterism: 2 handle stars, then a paddle of five stars
*
*
* *
* *
*
Septet viewed to left; however, observations first noted some very faint, ethereal objects to right. Objects noted to right are apparently visual artifacts: perhaps faint (12-14m) *s.
Septet observations: 26mm: two very faint interacting gal. Distinct: almost, but not quite, touching each other: probably NGC3753 (57a @ 14.0m) and one or both of 3750 (57c @ 14.6m) or 3754 (57d @ 14.5m) 8mm: two seen in 26mm. Parallel to them another pair: probably NGC3746 (57b @ 14.3m), NGC3748 (57e @ 15.4m). Up toward handle NGC3751 (57f @ 15.2m)
Notes on objects that charts suggest are visual artifacts:
26mm: hint to right of paddle asterism parallel to area between last of handle stars and first of paddle stars.
17mm: still a sense of what was noted in 26mm. In addition one “below” parallel to the paddle itself.
13mm: Now see several more. As before, but now two where paddle expands from handle, and an additional two more where second pair of paddle stars.
8mm: able to get good focus with steady image. Still have sense of four or five gal in line roughly parallel to paddle asterism.
After reviewing disc believe these may be
UCAC4-559-050563 @ 12.2m
UCAC4-559-050566 @ 12.3m
UCAC4-559-050570 @ 14.4m
UCAC4-559-050571 @ 13.4m
ID: NGC3753
Type: Galaxy; RA Dec: 113753+2158; Constellation: Leo
Name: Arp320; Mag: 13.6
Date: Thursday, May 21, 2020 11:40:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
FOV shows “paddle” asterism: 2 handle stars, then a paddle of five stars
*
*
* *
* *
*
Septet viewed to left. Septet observations: 26mm: two very faint interacting gal. Distinct: almost, but not quite, touching each other: probably NGC3753 (57a @ 14.0m) and one or both of 3750 (57c @ 14.6m) or 3754 (57d @ 14.5m) 8mm: two seen in 26mm. Parallel to them another pair: probably NGC3746 (57b @ 14.3m), NGC3748 (57e @ 15.4m). Up toward handle NGC3751 (57f @ 15.2m)
ID: NGC3746
Type: Galaxy; RA Dec: 113742+2201; Constellation: Leo
Name: SAC5578; Mag: 14.2
Date: Thursday, May 21, 2020 11:41:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
See NGC3753 notes
ID: NGC3748
Type: Galaxy; RA Dec: 113748+2202; Constellation: Leo
Name: SAC5579; Mag: 14.8
Date: Thursday, May 21, 2020 11:41:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
See NGC3753 notes
ID: NGC3750
Type: Galaxy; RA Dec: 113754+2158; Constellation: Leo
Name: SAC5581; Mag: 13.9
Date: Thursday, May 21, 2020 11:41:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
See NGC3753 notes
ID: NGC3754
Type: Galaxy; RA Dec: 113754+2159; Constellation: Leo
Name: SAC5584; Mag: 14.3
Date: Thursday, May 21, 2020 11:41:00 PM-05
Found: True; Telescope: Dob; Eyepiece: 26mm Nagler Type 5; Magnification: 82x
Observation Notes:
See NGC3753 notes