David's Astronomy Pages Images - Session 1440 (2026-07-23)

Images (S1439)

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Image (S1441)

Objects	Session Notes
70P/Kojima - Comet  (non-detection)   LEDA 214810 - Galaxy with Type Ia Supernova 2026lda  (non-detection)   Variable Stars (photometric monitoring) - None   Nearby Stars (astrometric monitoring) - None	- Attempted All-Night Session (3.9 hr). Interrupted by cloud - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 10.5°C (min) - CCD Temperature:  -10°C - Notes from 2026-07-23 >> - -

Observing Result

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70P/Kojima  - Comet  (non-detection)

70P/Kojima - 2026-07-24 (passing through Aquarius) Sun Distance 4.89 AU Earth Distance 4.02 AU (601.4 million km) Expected position of comet (not visible) is shown by white circle		70P/Kojima - 2026-07-24 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -14.8 arcsec/hr, Dec -8.7 arcsec/hr) Non-detection Limiting Magnitude +17.3 (Clear Filter)
Annotated CCD Image (50% size, square root scale) 6 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-07-24 02:02 UT (#1440022-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) 6 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-07-24 02:02 UT (#1440022-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of Comet 70P Kojima on Comets 2026 Page  >>

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LEDA 214810  - Galaxy with Type Ia Supernova 2026lda  (non-detection)

LEDA 214810 with SN 2026lda (Pegasus) SN 2026lda (Type: Ia) discovered 2026-04-29.492 UT by ZTF Alias: DCAP34, ZTF26aaupgtw Discovery Magnitude 19.207 (r-ZTF Filter) vs Prior Non-Detection Limiting Magnitude ( Filter) Group reports the discovery of a candidate SN.(DCAP pipeline DCAP34=ZTF26aaupgtw) ( TNS 2026lda )

LEDA 214810 with SN 2026lda - 2026-07-24 (T+85.5d) Image below (2026-07-24.022) was taken 85.5 days after discovery of 2026lda Position of earlier supernova (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.8 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-07-24 00:39 UT (#1440010-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026lda (in LEDA 214810) on Supernovae 2026 Page  >>

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