Comet 2022E3 ZTF on Jan 20-21, 2023
Click on image to enlarge
Change during 24 hours (f=530mm prime focus)
| Date & Time: | Upper: Jan 20 2023, from 26:57 to 27:42 JST(+0900), 5min.×10shots |
| Lower: Jan 21 2023, from 25:53 to 26:38 JST(+0900), 5min.×10shots |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-D1 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI JP Equatorial & SBIG STV |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -25°C) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording format...16bit FITS, converted to 16bit TIFF(6248×4176) |
| Device Size...23.5×15.7mm, Gain...100 |
Click on image to enlarge
Close-up of coma (f=1600mm prime focus)
| Date & Time: | Left: Jan 20 2023, from 27:10 to 27:54 JST(+0900), 4min.×12shots |
| Right: Jan 21 2023, from 26:50 to 27:35 JST(+0900), 4min.×12shots |
| Optical: | Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3) |
| with IDAS LPS-P1 Light-pollution suppression filter |
| Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN |
| Digital Camera: | Nikon D810A |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080) |
| Device Size...20×20mm |
| Sensitivity...ISO4000, White Balance...Daylight |
Rotational-unsharp masking (0.9°) processed with StellaImage9.0
Click on image to enlarge
f=324mm prime focus
| Date & Time: | Jan 21 2023, from 26:05 to 27:22 JST(+0900) |
| Composed 20 shots with 4 minutes exposed |
| Optical: | BORG 67FL with conversion lens (f=324mm, F4.8) |
| with BaaderPlanetarium Moon&Skyglow filter |
| Auto-guided with VIXEN ATLUX Equatorial |
| Digital Camera: | Canon EOS 6D (Remodeled) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648) |
| Device Size...36×24mm, Sensitivity...ISO2500 |
Comet 2022E3 ZTF is brightening steadily toward its closest approach to the Earth in February 2023, the coma on this day was observed as 6th magnitude.
At this time, the comet is moving north from the northernmost part of Bootes to the area of Draco in the northeastern sky after midnight.
The coma has a diameter of about 20 arc minutes and can be easily seen with binoculars.
It can be seen that the ion tail extending to the WNW has changed greatly in 24 hours.
Also, a faint anti-tail can be seen in the eastern direction.
1st image: View angle: 2.4×1.6°
2nd image: View angle: 0.7×0.7°
3rd image: View angle: 5.9×3.9°
