David's Astronomy Pages Images - Session 613 (2018-06-11)

Images (S612)

Images Sessions

Home Page

Images (S614)

Objects

Session Notes

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°C (minimum) - Notes from 2018-06-11 >>

Sigma CrB - Double Star

Sigma CrB (Corona Borealis) Brightest star is Sigma CrB (two closely spaced componets shine at +5.6 & +6.4 magnitude)

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

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.

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

CCD Image (200% size, cropped) Image details as above

Back to Top

 Hickson 70 - Galaxy Group  (IC 4371 et al)

Hickson 70 (Canes Venatici)

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)

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)

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

Back to Top

IC 4997 - Planetary Nebula

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

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

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)

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

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

Back to Top

NGC 5229 - Spiral Galaxy (M51 Group) 

NGC 5229 (Canes Venatici)

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)

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)

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)

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

Back to Top

NGC 6879 - Planetary Nebula

NGC 6879 (Sagitta) (taken under nautical twilight sky, solar depression 8.8 deg)

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

Back to Top