David's Astronomy Pages
CCD Images - Session 940 (2021-12-10)

Objects Session Notes
Bullet 10P/Tempel - Comet
   
Bullet AT2021abed - Type ulens? Transient
    
Bullet Variable Stars (photometric monitoring)
- None
    
Bullet Nearby Stars (astrometric monitoring)
- None
  
   
- Evening session 5.6 hours
- First Session using new Observatory Computer
(due to failure of previous computer in last session, 2021-12-05)
-   Only 2 targets were successfully imaged during session.   This was due to a show-stopping 'SideOfPier' issue when trying to guide on targets lying west of Meridian due to Guide Calibration being flipped.
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature: -3°C (min)
- CCD Temperature:  -25°C
- Notes from 2021-12-10 >>
   [ Local Files >> ]
   

10P/Tempel - Comet

10P/Tempel
 (passing through Taurus)
Sun Distance 2.73 AU  (receeding)
Earth Distance 1.80 AU (269.4 million km)
Position of comet shown by white cross-hairs
   10P/Tempel - 2021-12-05, Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra -33.53 arcsec/hr, Dec 7.17 arcsec/hr)
Image   Image
Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, C Filter
2021-12-10 20:59 UT (#940012-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  CCD Image (100% size, square root scale, cropped)
 Image details as left
     
Images of 10P/Tempel on Comets 2021 Page >>    

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AT2021abed - Type ulens? Transient

AT2021abed (Camelopardalis)
AT2021abed (Type: ulens?) discovered 2021-10-06.764 UT by Gaia
Alias: Gaia21epq
Tranisent alert triggered by Gaia at mag +14.2 compared
to a historic mag value of + 14.49
 [ Gaia21epq
Image
Annotated CCD Image  (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, C Filter
2021-12-10 20:42 UT (#940004-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
AT2021abed - Detail
Image below (2021-12-10.857) was taken 65.1 days after discovery of 2021abed
Image
Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, C Filter
2021-12-10 20:42 UT (#940004-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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