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CCD Images - Session 613 (2018-06-11)
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Sigma CrB - Double Star Hickson 70 - Galaxy Group (IC 4371 et al) IC 4997 - Planetary Nebula NGC 5229 - Spiral Galaxy (M51 Group) NGC 6879 - Planetary Nebula Photometric Monitoring - Variables - None Astrometric Monitoring - Nearby Stars - None
- Night Session (2 hrs duration).
Clear summer twilight skies, low wind- Session operated and monitored remotely from indoors - Main aims of the session was to test automated acquisition of images of a sequence of targets (Plan) that have been scheduled by a newly developed genetic algorithm optimisation program working with target data held in SQLite, and to acquire images of a number of targets
In the event computer/software issues (POTH, telescope connection, CCDSoft5 freezing) prevented the execution of the first half of the plan.
- 12" LX200 + ST-10XME for imaging- Ambient Temperature: 8 degC (minimum) - Notes from 2018-06-11 >>
| Sigma CrB (Corona Borealis) Brightest star is Sigma CrB (two closely spaced componets shine at +5.6 & +6.4 magnitude) |
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| CCD Image (50% size) 5 x 5s exposure (average combine), 3x3 binning, C Filter 2018-06-12 00:42 UT (#613023-27) 12" LX200R (at f/10.4) + ST-10XME |
| Sigma CrB - Detail The two individual star components are lost in the glare of the combined object |
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| CCD Image (100% size, cropped) Image details as above |
| Sigma CrB - Shorter Exposure (0.2s image) Object is recognizable as a closely space double star in this shorter exposure. |
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| CCD Image (100% size, cropped) 0.2s exposure (single frame), 2x2 binning, C Filter 2018-06-12 01:39 UT (#613070) 12" LX200R (at f/10.4) + ST-10XME |
| Sigma CrB - Shorter Exposure - Detail Black-White Range adjusted to highlight separation Separation is measured at 7.5 arc sec from the image. This is close to the current recognised separation of 7.2 arc sec |
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| CCD Image (200% size, cropped) Image details as above |
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| Hickson 70 (Canes Venatici) |
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| CCD Image (50% size) 5 x 90s exposure (average combine), 3x3 binning, C Filter 2018-06-12 00:22 h UT (#613014-18) 12" LX200R (at f/10.4) + ST-10XME |
| Hickson 70 - Detail (taken under nautical twilight sky, solar depression 9.5 deg) |
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| CCD Image (cropped) Image details as above |
| Hickson 70 - Earlier Detail (2015-05-14) 70a - IC 4370 (catalog mag +15.7), 70b - IC 4371 (catalog mag +14.2), 70c - PGC 50159 (catalog mag +16.0), 70d - IC 4370 (catalog mag +14.9), 70e - IC 4369 (catalog mag +15.4), 70f - PGC 50133 (catalog mag +17.3), 70g - PGC 50123 (catalog mag +16.4) (taken under astronomical twilight sky, solar depression 13.6 deg) |
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| Annotated CCD Image (cropped) 3 x 90s exposure (average combine), 3x3 binning, C Filter 2015-05-14 23:34 h UT (#589085-87) 12" LX200R (at f/10.4) + ST-10XME |
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| IC 4997 (Sagitta) IC 4997 looks like a pretty normal star in this high resolution image, (0.442 arc sec/pixel) . No detail of a planetary nebula is visible |
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| CCD Image (100% size, cropped) 3 x 90s exposure (average combine), 1x1 binning, C Filter 2018-06-12 01:22 UT (#613048-51) 12" LX200R (at f/10.4) + ST-10XME |
| IC 4997 - Spectra Image taken through SA-100 diffraction grating In this image the tell-tell dual peaks typical of a planetary nebula reveal the true nature of IC 4997. Compare spectra against the uniform spectra of normal stars |
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| CCD Image, Spectra (50% size) 90s exposure (single raw frame), 3x3 binning, S Filter 2018-06-12 01:28 UT (#613053) 12" LX200R (at f/10.4) + ST-10XME |
| IC 4997 - Spectra Image detail Star (left), Spectra (middle) (spectra from a normal star on lower left) |
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| CCD Image, Spectra (100% size, rotated, cropped) Image details as above |
| IC 4997 - Earlier Image 2017-11-02 Starfield with position of planetary nebula is shown by white cross-hairs |
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| Annotated CCD Image (50% size) 2 x 30s exposure (average combine), 3x3 binning, C Filter 2017-11-02 19:28h UT (#603076-81) 12" LX200R (at f/10.4) + ST-10XME |
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| NGC 5229 (Canes Venatici) |
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| CCD Image (50% size) 2 x 90 sec exposure (average combine), 3x3 binning, C Filter 2014-11-23 23:58hUT (#571290-94) 12" LX200R (at f/10.4) + ST-10XME |
| NGC 5229 - detail (taken under nautical twilight sky, solar depression 8.8 deg) |
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| CCD Image (100% size, cropped) Image details as above |
| NGC 5229 - Earlier Image (2014-11-23) (taken under dark moonless sky, solar depression 53 deg) |
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| CCD Image (100% size, cropped) 5 x 90 sec exposure (average combine), 3x3 binning, C Filter 2014-11-23 23:58hUT (#571290-94) 12" LX200R (at f/10.4) + ST-10XME |
| NGC 5229 - Earlier Image (2014-11-02) (taken under dark moonlit sky (53% phase), solar depression 47 deg) |
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| CCD Image (100% size, cropped) 5 x 60 sec exposure (average combine), 3x3 binning, C Filter 2014-11-02 23:17hUT (#567326-30) 12" LX200R (at f/10.4) + ST-10XME |
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| NGC 6879 (Sagitta) (taken under nautical twilight sky, solar depression 8.8 deg) |
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| CCD Image (100% size, cropped) 180s exposure (single frame), 1x1 binning, C Filter 2018-06-12 01:02 UT (#613040) 12" LX200R (at f/10.4) + ST-10XME |
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| This Web Page: | CCD Images - Session 613 (2018-06-11) |
| Last Updated : | 2023-11-27 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
