[vsnet-outburst 22526] V643 Sco: most likely low-amplitude Z Cam star

[Taichi Kato]

V643 Sco: most likely low-amplitude Z Cam star

ASAS-SN data:
https://asas-sn.osu.edu/light_curves/36e29aa3-125b-4dec-9268-31ac0a8b8056

   Range 13.1-14.1

   Ordinary cycle lengths about 30 d.  Standstill-like
behavior in 2018.

Gaia data (M_V = +3.4 at max)
172555.403 -405807.41 (2000.0) Gaia_DR2_5960034380518206080 plx=1.126(0.041) dismod=9.7 pmra=1.666(0.065) pmdec=-15.262(0.049) G=13.752 BP=13.860 RP=13.383