David's Astronomy Pages
CCD Images - Session 753 (2020-02-20)
Images
(S752)
Images
Sessions
Home
Page
Images
(S754)
David's Astronomy Pages
|
Images (S752) |
Images Sessions |
Home Page |
Images (S754) |
Objects Session Notes
C/2017 T2 (PanStarrs) - Comet Abell 1689 - Galaxy Cluster IC 3074 - Spiral Galaxy Rose 5 - Compact Galaxy Group (PGC 36826 et al) Rose 14 - Compact Galaxy Group (PGC 48433) Rose 22 - Compact Galaxy Group (PGC 1387460 et al) Rose 28 - Compact Galaxy Group (PGC 38421) Rose 30 - Compact Galaxy Group (NGC 5058) Segue 1 - Faint Dwarf Galaxy - 0.075mly Variable Stars (photometric monitoring) - AM CVn, SY Cnc, U Gem, RZ LMi, U Mon, DY Per, RR Tau Nearby Stars (astrometric monitoring) - DX Cnc, Groombridge 34, LAMOST-HVS1, Scholz's Star
- All night session (6.3 hours total).
- Main aims of the session was to acquire images of a selection of deep sky and comet objects - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1.5°C (min)
(Dew heaters on auto)- CCD Temperature: -20°C (59% av. power) - Notes from 2020-02-20 >>
| C/2017 T2 (PanStarrs) - 2020-02-20 (passing through Cassiopeia) Sun Distance 1.89 AU Earth Distance 1.71 AU (256.1 million km) |
C/2017 T2 (PanStarrs) - 2020-02-20, Detail Autoguided on an offset star using Lock Shift set at the comet's rate of motion (Ra 3.38 arcsec/hr, Dec 20.12 arcsec/hr) |
|
 |
 |
|
| CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2020-02-20 21:07 UT (#753025-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
CCD Image (100% size, log scale, cropped) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2020-02-20 21:10 UT (#753025-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
|
| Images of C/2017 T2 (PanStarrs) on Comets 2019 Page | ||
| Images of C/2017 T2 (PanStarrs) on Comets 2020 Page |
| False Colour Image of C/2017 T2 (PanStarrs) - 2020-02-20 |
 |
| False Colour CCD Image (70% size, log scale) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2020-02-20 21:10 UT (#753025-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
Back to Top
| Abell 1689 (Virgo) Abell 1689 is one of the biggest and most massive galaxy clusters known and acts as a gravitational lens, distorting the images of galaxies that lie behind it. It has the largest system of gravitational arcs ever found |
 |
| CCD Image (70% size, square root scale) CCD Image (50% size) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-21 02:27 UT (#753194-98) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Abell 1689 - Detail |
 |
| CCD Image (125% size, square root scale, cropped) Image details as above |
 |
| Negative CCD Image (125% size, square root scale, cropped) Image details as above |
| Abell 1689 - Central Area |
 |
| CCD Image (125% size, square root scale, cropped) Image details as above |
| Abell 1689 - Reference Image Credit : ESA/Hubble |
 |
| Rotated, cropped and converted to grey scale from original
ESA/Hubble Image https://commons.wikimedia.org/wiki/File:New_Hubble_view_of_galaxy_cluster_Abell_1689.jpg |
Back to Top
| IC 3074 (Virgo) Flat Galaxy Atlas |
 |
| CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-21 00:47 UT (#753162-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| IC 3074 - Detail |
 |
| CCD Image (100% size, square root scale, cropped) Image details as above |
| IC 3074 - Earlier Detail (2020-01-27) |
 |
| CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2020-01-27 02:26 UT (#746105-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
Back to Top
| Rose 5 / PGC 36826 et al (Ursa Major) Rose Catalogue [ Rose Compact Galaxy Groups ] |
 |
| Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-13 22:46 UT (#752183-87) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Rose 5 - Detail PGC 36826 (catalog mag +15.5), PGC 36838 (catalog mag +15.7), MAC 1148+3726, PGC 2100898 |
 |
| Annotated CCD Image (150% size, square root scale, cropped) Image details as above |
 |
| Negative CCD Image (150% size, square root scale, cropped) Image details as above |
| Rose 5 - Earlier Image (2020-01-26) Single frame |
 |
| CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2020-01-26 21:35 UT (#746008) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
Back to Top
| Rose 14 / PGC 48433 et al (Virgo) Rose Catalogue [ Rose Compact Galaxy Groups ] with adjacent galaxies : PGC 1205933 (catalog mag +16.8), , PGC 1204160 (catalog mag +18.0), PGC 1205120 (catalog mag +18.4), PGC 1207534 (catalog mag +18.9), PGC 1203334 (catalog mag +19.0) |
 |
| Annotated CCD Image (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-21 02:47 UT (#753201-04) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Rose 14 - Detail A) PGC 159377 / CGCG 17-59 (catalog mag +17.1), B) PGC 48433 (catalog mag +16.0), C) SDSS J13411.24+014634.9, D) SDSS J13411.49+014640.9 |
 |
| CCD Image (150% size, square root scale, cropped) Image details as above |
 |
| Negative CCD Image (150% size, square root scale, cropped) Image details as above |
Back to Top
| Rose 22 / PGC 1387460 et al (Bootes) Rose Catalogue [ Rose Compact Galaxy Groups ] Adjacent Galaxies : PGC 1386943 (catalog mag +18.6), PGC 1387310 (catalog mag +18.1), PGC 1388019 (catalog mag +18.9), PGC 1387361 (catalog mag +19.0) |
 |
| Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-21 01:33 UT (#753176-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Rose 22 - Detail PGC 1387460 (catalog mag + 17.0), PGC 1387640 (catalog mag +17.7), SDSS J144958.73+110015.8, MAPS-NGP O_502_0199428 |
 |
| CCD Image (100% size, square root scale, cropped) Image details as above |
 |
| Negative CCD Image (100% size, square root scale, cropped) Image details as above |
Back to Top
| Rose 28 / PGC 38421 (Coma Berenices) Rose Catalogue - Rose 28 / PGC 38421 (catalog mag +15.9) [ Rose Compact Galaxy Groups ] with adjacent galaxies : PGC 1711696 (catalog mag +16.7) and PGC 1713116 (catalog mag +17.2) |
 |
| Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-21 01:33 UT (#753176-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Rose 28 - Detail PGC 38421 (catalog mag +15.9) Rose 28 / PGC 38421 is an unresolved mass of several galaxies |
 |
| CCD Image (150% size, square root scale, cropped) Image details as above |
 |
| Negative CCD Image (150% size, square root scale, cropped) Image details as above |
Back to Top
| Rose 30 / NGC 5058 (Virgo) Rose Catalogue, Note: Image acquired with 2x2 binning / half frame [ Rose Compact Galaxy Groups ] |
 |
| Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 2x2 binning (half-frame), C Filter 2020-02-21 01:09 UT (#753168-72) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Rose 30 - Detail NGC 5058 is an unresolved mass of several galaxies around 0.6 arc min across |
 |
| CCD Image (125% size, square root scale, cropped) Image details as above |
 |
| Negative CCD Image (125% size, square root scale, cropped) Image details as above |
| Rose 30 / NGC 5058 - Earlier Image (2019-12-31) |
 |
| CCD Image (70% size, square root scale) 3 x 180s exposure (average combine), 2x2 binning (half-frame), C Filter 2019-12-31 06:06 UT (#733325-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
Back to Top
| Segue 1 (Leo) Milky Way Dwarf Galaxy Satellite Segue 1 is a dwarf spheroidal galaxy or globular cluster situated in the Leo constellation and discovered in 2006 by Sloan Digital Sky Survey. It is located at a distance of about 75,000 light years Segue 1 is one of the smallest and faintest satellites of the Milky Way. Its integrated luminosity is about 300 times that of the Sun which is much smaller than the luminosity of a typical globular cluster. Observations however indicate its mass is about 600,000 solar masses, which suggest that it is dominated by dark matter. In the image below the approximate area of Segue 1 dwarf galaxy is indicated by large white circle. By comparison with reference image (Keck/Deimos image) the visible stars that are understood to lie in Segue 1 are indicated by green circles [ Local Group Galaxies ] Note: a longer exposure is required to detect more stars lying in the dwarf galaxy |
 |
| Annotated CCD Image (70% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-20 23:58 UT (#753140-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Segue 1 - Keck/Deimos Reference Image |
 |
| Credit: Marla Geha Image has been rotated and resized to match own image |
| Segue 1 - Unannotated Images |
 |
| Annotated CCD Image (70% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-02-20 23:58 UT (#753140-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
 |
| Negative CCD Image (70% size, square root scale) Image details as above |
Back to Top
| This Web Page: | CCD Images - Session 753 (2020-02-20) |
| Last Updated : | 2024-06-01 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
