[vsnet-alert 25474] Re: ASASSN-21co

[Siegfried Vanaverbeke siegfriedvanaverbeke@gmail.com via vsnet-alert]

All,

This object has an asymmetric eclipse which is now ongoing.  Its orbital
period is close to 11.8 years.  The primary is a red giant, the secondary
unknown but most likely with a giant ring system.

Siegfried

Op ma 1 mrt. 2021 om 02:43 schreef Taichi Kato <tkato at kusastro.kyoto-u.ac.jp
>:

> ASASSN-21co
>
>    Eclipsing binary with a long oribital period.
> Eclipse in 2009 Apr.-May in ASAS-3 data.
>
> ASASSN-21co     ---     -------         18:17:51.53     -58:7:49.2
> 2021-02-27.34   13.05   SDSS    DSS     VIZIER  -------         star with a
> deep dimming event, matches to GAIA DR2 G=10.9, full ASAS-SN light curve
> and the last 25 days.
>
> GSC8756.1555 181751.57 -580749.0 (2000.0) 12.61 0
>
> 2MASS 181751.512 -580749.39 (2000.0) 8.228 7.358 7.135
>
> 181751.516 -580749.34 (2000.0) Gaia_DR2_6647970630972147840
> plx=0.333(0.074) dismod=12.4 pmra=-3.311(0.141) pmdec=-1.774(0.118)
> G=10.859 BP=12.031 RP=9.815
> 181751.515 -580749.34 (2000.0) Gaia_EDR3_6647970630972147840
> plx=0.341(0.021) dismod=12.3 pmra=-3.444(0.019) pmdec=-1.616(0.020)
> G=10.861 BP=12.005 RP=9.797
>
>