David's Astronomy Pages
CCD Images - Session 941 (2021-12-13)

Objects Session Notes
Bullet C/2017 K2 (PANSTARRS) - Comet
   
Bullet KIC 8462852 - Variable Star (Tabby's Star)
Bullet Nova Cas 2021 - Nova (V1405 Cas)
   
Bullet AT2021aegs - CV Type Transient
Bullet AT2021aemj - Transient
   
Bullet M31 - Spiral Galaxy with Transient AT2021aaxp (attempt)
   
Bullet UGC 1977 - Spiral Galaxy (PGC 9557)
Bullet UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw
    
Bullet Variable Stars (photometric monitoring)
- RX And, SS Cyg, BL Lac, SU Tau
    
Bullet Nearby Stars (astrometric monitoring)
- HH And, Groombridge 34, EV Lac
  
   
- Evening session 5.9 hours
-  
- 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 2021-12-13 >>
   [ Local Files >> ]
   

C/2017 K2 (PANSTARRS) - Comet

C/2017 K2 (PANSTARRS)
(passing through Hercules)
Sun Distance 4.56 AU (approaching)
Earth Distance 5.29 AU (791.1 million km)
   C/2017 K2 (PANSTARRS) - 2021-12-13, Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra 29.48 arcsec/hr, Dec -15.35 arcsec/hr)
Image   Image
Annotated CCD Image (50% size, square root scale)
3 x 45s exposure (average combine), 3x3 binning, C Filter
2021-12-13 18:13 UT (#941014-16)
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)
9 x 45s exposure (average combine), 3x3 binning, C Filter
2021-12-13 18:16 UT (#941014-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
     
Images of C2017 K2 (PANSTARRS) on Comets 2021 Page >>    

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KIC 8462852 - Variable Star (Tabby's Star)

KIC 8462852 / Tabby's Star (Cygnus)
Alias: Boyajian's Star, WTF Star ("Where’s the Flux?")
Distance 1470 ly. Magnitude +11.7
Star shows large irregular dimmings.
KIC 8462852 shown by white cross-hairs
Measured Mag +11.70 (V)
(linked with Detection Threshold = 8)
Image
Annotated CCD Image  (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2021-12-13 18:28 UT (#941024-26)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
KIC 8462852  - Earlier Image (2021-08-13)
Measured Mag +11.1 (V)
Image
Annotated CCD Image  (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2021-08-13 23:24 UT (#905040-42)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
KIC 8462852  - Earlier Image (2021-07-25)
Measured Mag +11.71 (V)
Image
Annotated CCD Image  (50% size, linear scale)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2021-07-25 01:24 UT (#902129-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
KIC 8462852  - Earlier Image (2020-12-02)
Measured Mag +11.94 (C), + 11.82 (V)
Image
Annotated CCD Image  (50% size, linear scale, cropped)
4 x 30s exposure (average combine), 3x3 binning, C Filter
2020-12-02 21:38 UT (#837157-65)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
KIC 8462852 Links:
AAVSO Info : https://www.aavso.org/category/tags/kic-8462852

Unofficial Page for Where's the Flux?

Discovery Paper:  1509.03622.pdf (arxiv.org)

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Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia)
Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan)
Magnitude at discovery +9.6 (unfiltered CCD)
AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia
Alias: Gaia21bpe, AT2021hkn, V1405 Cas
 
Nova Cas 2021 / AT2021hkn - 2021-12-13 (T+270.4d)
Image below (2021-12-13.838) was taken 270.4 days after discovery of Nova
Nova is shown by white cross hairs.  Measured magnitude +8.98
(linked with Detection Threshold = 50)
Image 
Annotated CCD Image (100% size, linear scale, cropped)
5 x 30s exposure (average combine), 3x3 binning, C Filter
2021-12-13 20:07 UT (#941091-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Nova Cas 2021 (V1405 Cas) Spectra - 2021-12-13 (T+270.4d)
Image
Spectra produced in AstroMain using Image taken with Star Analyser 200
5 x 30s exposure (average combine), 2x2 binning, S Filter
2021-12-13 20:11 UT (#941096-100)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of Nova Cas 2021 on Novae Page >>

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AT2021aegs - CV Type Transient

AT2021aegs (Cepheus)
AT2021aegs (Type: CV) discovered 2021-11-10.435 UT by Gaia
Alias: Gaia21fcs
 [ Gaia21fcs
AT2021aegs / Gaia21fcs is shown by white cross-hairs
Image
Annotated CCD Image  (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-12-13 18:39 UT (#941030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
AT2021aegs - 2021-12-13 (T+33.3d)
Image below (2021-12-13.774) was taken 33.3 days after discovery of 2021aegs.
Image
Annotated CCD Image (125% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-12-13 18:39 UT (#941030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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AT2021aemj - Transient

AT2021aemj (Cepheus)
AT2021aemj (Type: CV) discovered 2021-11-12.439 UT by Gaia
Alias: Gaia21fcz
Transient alert triggered at magnitude + 14.39
(0.2 mag rise over historic magnitude +14.61)
 [ Gaia21fcz
AT2021aemj / Gaia21fcz is shown by white cross-hairs
Image
Annotated CCD Image  (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-12-13 19:56 UT (#941082-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
AT2021aemj - 2021-12-13 (T+31.4d)
Image below (2021-12-13.828) was taken 31.4 days after discovery of 2021aemj
Measured mag + 13.47 vs catalog mag +13.5
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-12-13 19:56 UT (#941082-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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M31 - Spiral Galaxy with CV Type Transient AT2021aaxp (attempt)

M31 with AT2021aaxp (Andromeda)
AT2021aaxp (Type: CV) discovered 2021-10-09.613 UT by Balam
Alias: PNV J00444033+4113068
Discovery Magnitude 17.77 (G-Gaia Filter)
Spectrum indicates this object is not a nova in M31 but a
CV in the Milky Way Galaxy (TNS 2021aaxp classification)
 Rochester EGN Page | Klaus Wenzel image |  TNS 2021aaxp )
 
Image
Annotated CCD Image  (50% size, square root scale)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-12-13 19:10 UT (#941055-59)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
M31 with AT2021aaxp - 2021-12-13 (T+65.2d)
Image below (2021-12-13.797) was taken 65.2 days after discovery of 2021aaxp
Position of earlier transient (no longer visible) is shown by white circle
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, C Filter
2021-12-13 19:10 UT (#941055-59)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of AT 2024aaxp (in M31) on Transients 2021 Page >>    

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UGC 1977 - Spiral Galaxy (PGC 9557)

UGC 1977 / PGC 9557
Image
Annotated CCD Image  (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, C Filter
2021-12-13 21:31 UT (#941144-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
UGC 1977 - Earlier Image (2021-11-16)
Image
Annotated CCD Image  (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-16 23:45 UT (#934054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
UGC 1977 - Earlier Image (2021-11-09)
Image
Annotated CCD Image  (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, C Filter
2021-11-09 22:53 UT (#932117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  

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UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw

UGC 2605 with SN2021wvw (Perseus)
SN 2021wvw (Type: II, z=0.009944) discovered 2021-08-24.606 UT by PS1
Alias: PS21jnb
Host Alias : PGC 12073
 (Rochester Supernova site )
  
 
UGC 2605 with SN2021wvw - 2021-12-13 (T+111.2d)
Image below (2021-12-13.804) was taken 111.2 days after discovery of 2021wvw
Position of earlier Supernova (no longer visible) is shown by white cross-hairs
Image
Annotated CCD Image  (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, C Filter
2021-12-13 19:28 UT (#941063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
UGC 2605 with SN2021wvw - Earlier Image, 2021-08-28 (T+3.5d)
Image below (2021-08-28.109) was taken 3.5 days after discovery of 2021wvw
Supernova shown by white cross-hairs
Measured magnitude +17.35
(linked with Detection Threshold = 3)
Image
CCD Image  (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, C Filter
2021-08-28 02:46 UT (#909215-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2021wvw (UGC 2605) on Supernovae 2021 Page >>

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