David's Astronomy Pages CCD Images - Session 825 (2020-10-30)

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Session Notes

184P/Lovas - Comet (attempted observation) C/2019 K7 (Smith) - Comet     LP 759-36 - High Proper Motion Star     Variable Stars (photometric monitoring) - Z And, CI Cyg, BL Lac   - U And Attempt (failed due to cloud)     Nearby Stars (astrometric monitoring) - None   - Teegardens Star attempt (failed due to cloud)

- Evening session (3.2 hour) cut short by developing clouds / overcast conditions - Main aims of the session were the testing of new routines & bug fixes and acquisition of a selection of deep sky targets, together with some variable star, nearby star and comet targets (if conditions allowed) - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 3°C (min) - CCD Temperature:  -20°C - Notes from 2020-10-30 >>      -

184P/Lovas - Comet (attempted observation)

184P/Lovas (passing through Aquarius) Sun Distance 1.70 AU Earth Distance 1.06 AU (159.0 million km) Atttempted observation of comet 184P/Lovas but after checking  the image against a DSS2 reference image using Aladdin, it was determined that no indication of the comet was visible at the expected location (circled) and expected magntiude (+15.9)		Image Detail Comet's expected position indicated by white circle in image below. Whilst attempting to identify the comet and rule out candidate objects in the vicinity it was noticed that one star was at a  slightly different position compared to its position in the DSS2 reference image.   The star was determined to  be LP 739-36, a high proper motion star
Annotated CCD Image (50% size, linear scale) 7 x 60s exposure (average combine), 3x3 binning, C Filter 2020-10-30 19:34 UT (#825060-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, linear scale, cropped) Image details as left
Images of 184P/Lovas on Comets 2020 Page >>

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C/2019 K7 (Smith) - Comet

C/2019 K7 (Smith) (passing through Hercules) Sun Distance 4.61 AU Earth Distance 4.87 AU (729.1 million km)		C/2019 K7 (Smith) - 2020-10-30, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's (slow) rate of motion (Ra 6.47 arcsec/hr, Dec -0.09 arcsec/hr)
Annotated CCD Image (50% size, linear scale) 6 x 60s exposure (average combine), 3x3 binning, C Filter 2020-10-30 19:48 UT (#825068-74) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, linear scale, cropped) Image details as left
Images of C/2019 K7 (Smith) on Comets 2020 Page >>

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LP 759-36 - High Proper Motion Star

LP 759-36 (Aquarius) Whilst attempting (unsuccessfully) to identify comet 184P/Lovas in the image below using Aladdin it was noticed that one star was at a  slightly different position compared to its position in the DSS2 reference image.   The star was determined to be LP 739-36, a high proper motion star  with proper motion of  -257.508 -309.233  mas/yr

Annotated CCD Image (50% size, linear scale) 7 x 60s exposure (average combine), 3x3 binning, C Filter 2020-10-30 19:34 UT (#825060-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LP 759-36 - Detail Star indicated by white cross-hairs

CCD Image (100% size, linear scale, cropped) Image details as above

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