David's Astronomy Pages Images - Session 1406 (2026-03-13)

Images (S1405)

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Image (S1407)

Objects	Session Notes
Nova Cas 2021 - Nova (V1405 Cas/AT 2021hkn)   Berkeley 50 - Open Cluster   NGC 6070 - Spiral Galaxy with Type II Supernova 2026ejy   - UGC 11058 attempt failed (due to cloud / bad guding)   Variable Stars (photometric monitoring) - Z And, T CrB, AM Her, BL Lac, CY Lyr   Nearby Stars (astrometric monitoring) - HH And (Ross 248), 61 Cyg   - Groombridge 34 attempt failed (due to cloud)	- All-Night Session (9.7 hr), Rain/Cloud affected much of the session and the net observing time was only 2.5 hr. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1°C (min) - CCD Temperature:  -20°/-25°C - Notes from 2026-03-13 >> - -

Observing Result

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Nova Cas 2021  - Nova (V1405 Cas/AT 2021hkn)

Nova Cas 2021 (Nova) (Cassiopeia) AT 2021hkn (Type: Nova) discovered 2021/03/18.4236 UT by Yuji Nakamura (Japan) Alias: Gaia21bpe, 2021hkn, V1405 Cas Discovery Magnitude 7.7 (G-Gaia Filter) vs Prior Non-Detection Limiting Magnitude 21.5 (G-Gaia Filter) Gaia Alerting Magnitude 7.70 vs Historic Magnitude 15.42 +/- 0.07 SD Gaia detection of Nova Cas 2021 ( TNS 2021hkn | Gaia21bpe ) [ Novae ]

Nova Cas 2021 - 2026-03-14 (T+1821.7d) Image below (2026-03-14.172) was taken 1821.7 days after discovery of 2021hkn Position of earlier transient (distinct) is shown by white cross-hairs Measured Magnitude +12.51 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 45s exposure (average combine), 3x3 binning, Clear Filter 2026-03-14 04:10 UT (#1406070-74) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 - Earlier Image, 2021-04-15 (T+27.7d) Image below (2021-04-15.083) was taken 27.7 days after after discovery of Nova Position of nova (bright) is shown by white cross hairs. Measured magnitude +8.10 Note: star object is saturated and shows some blooming, mag is probably underestimated

CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-04-15 02:02 UT (#885141-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021hkn on Transients 2021 Page  >>

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Berkeley 50  - Open Cluster

Berkeley 50 (Cygnus) [ Open Star Clusters ]

Annotated CMOS Image (16% size, linear scale (auto-stretched)) 30 x 15s exposure (average combine), 1x1 binning, gain 75, OSC 2026-03-14 04:36 UT (#) TS 80mm APO + ZWO ASI178MC Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 50 - Detail 7.6 mins total exposure (80mm TS80)

Annotated CMOS Image (50% size, linear scale (auto-stretched), cropped) 30 x 15s exposure (average combine), 1x1 binning, gain 75, OSC 2026-03-14 04:36 UT (#) TS 80mm APO + ZWO ASI178MC Auto-guided using 12" LX200R + ST-10XME & PHD2

Annotated CMOS Image (50% size, linear scale (auto-stretched), cropped) 30 x 15s exposure (average combine), 1x1 binning, gain 75, OSC 2026-03-14 04:36 UT (#) TS 80mm APO + ZWO ASI178MC Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 50 - Earlier Image (May 2020)

CCD Image (70% size, linear scale) 8 x 30s exposure (average combine), 3x3 binning, C Filter 2020-05-06 23:27 UT (#780088-96) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 6070  - Spiral Galaxy with Type II Supernova 2026ejy

NGC 6070 with SN 2026ejy (Serpens) SN 2026ejy (Type: II) discovered 2026-02-25.180 UT by GOTO Alias: GOTO26bnq, ZTF26aaiedvz, ATLAS26coa, BGEM J161000.25+004220.7 Discovery Magnitude 18.55 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 20.4 (L-GOTO Filter) ( TNS 2026ejy )

NGC 6070 with SN 2026ejy - 2026-03-14 (T+17.0d) Image below (2026-03-14.134) was taken 17.0 days after discovery of 2026ejy Position of earlier supernova ( ) is shown by white cross-hairs Measured Magnitude +15.66 (Clear Filter) Poor quality image (die to poor sky transparency/cloud)

Annotated CCD Image (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-03-14 03:20 UT (#1406045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026ejy (in NGC 6070) on Supernovae 2026 Page  >>

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