David's Astronomy Pages (Deep Sky) Type YSO Transients

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This page documents observations and images of Type YSO Transients (Young Stellar Objects), 2020-2021 Note : CV,  Novae and LRN transients are documented elsewhere (CV, Novae, LRN)
YSO  Name, type, discovery date, alias
AT 2021ckv - Type YSO Transient  (2021-02-08), GCVS PR Ori       2022 AT 2022dcp - Type YSO? Transient

AT 2021ckv - Type YSO Transient  (discovered 2021-02-08), GCVS PR Ori

AT 2021ckv / PR Ori  (Orion) AT 2021ckv (Type: YSO) discovered 2021/02/08.759 UT by Gaia Alias: Gaia21arx, GCVS PR Ori [ Gaia21arx ] Light Curve 2012-2018, Reipurth et al ] Based on brightening in known YSO, ESO-HA 1481 (4 mags in 3 years) and alerting magnitude of +12.25

AT 2021ckv / PR Ori - 2021-02-22 (T+14.1d) Image below (2021-02-22.822) was taken 14.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.1 (brightened) (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-22 19:52 UT (#861020-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021ckv / PR Ori - 2021-02-25 (T+17.1d) Image below (2021-02-25.849) was taken 17.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.5 (fading)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-25 20:31 UT (#863013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021ckv / PR Ori - 2021-02-26 (T+18.1d) Image below (2021-02-26.872) was taken 18.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.6 (fading)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-26 21:06 UT (#864055-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021ckv / PR Ori - 2021-02-27 (T+19.1d) Image below (2021-02-27.861) was taken 19.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.6 (fading ?)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-27 20:49 UT (#865049-53) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021ckv / PR Ori - 2021-03-05 (T+25.1d) Image below (2021-03-05.905) was taken 25.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.2 (brightening)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-05 21:53 UT (#867060-64) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021ckv - 2021-03-13 (T+33.1d) Image below (2021-03-13.897) was taken 33.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +10.86 (vs normal range of +12.2 to +13.6) Poor quality image (bright sky & thin cloud)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-13 21:41 UT (#869034-38) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021ckv - 2021-03-16 (T+36.1d) Image below (2021-03-16.880) was taken 36.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.10 (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-16 21:16 UT (#871025-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021ckv (PR Ori) on Transients 2021 Page >>

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AT 2022dcp - Type YSO? Transient

AT 2022dcp (Orion) AT 2022dcp (Type: YSO?) discovered 2022-02-23.068 UT by Gaia Alias: Gaia22atf [ TNS 2022dcp | Gaia22atf ]

AT 2022dcp /  Gaia22atf

Annotated CCD Image (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2022-03-01 20:00 UT (#980020-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022dcp - 2022-03-01 (T+6.8d) Image below (2022-03-01.829) was taken 6.8 days after discovery of 2022dcp Position of report YSO? transient (bright) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2022-03-01 20:00 UT (#980020-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022dcp - 2022-11-07 (T+257.1d) Image below (2022-11-07.125) was taken 257.1 days after discovery of 2022dcp Position of report YSO? transient (distinct) is shown by white cross-hairs Measured Magnitude +13.59 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2022-11-07 03:07 UT (#1056056-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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