[vsnet-alert 25608] ASASSN-21eh (= TCP J18490521-1902054): new transient (mag. 11) in Sagittarius

[Patrick Schmeer pasc1312-aavso@yahoo.de via vsnet-alert]

 ASASSN-21eh (= TCP J18490521-1902054)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=2217348
 
This transient has meanwhile also been reported on
the CBAT "Transient Objects Confirmation Page":
http://www.cbat.eps.harvard.edu/unconf/tocp.html
 
Spectroscopy and multiband photometry as well as
time-resolved photometry are required.
 
Clear skies,
Patrick
-------
     Am Donnerstag, 25. März 2021, 22:44:12 MEZ hat Kojiguchi Naoto <kojiguchi at kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
 ASASSN-21eh

     Large amplitude outburst of 8 mag. According to Gaia parallax value is "negative parallax", this object might be a classical nova.

ASASSN-21eh    ---    -------    18:49:5.05    -19:2:4.2 2021-03-25.29    11.54    SDSS    DSS    VIZIER    ------- bright CV candidate, matches to PS1 g=20.0, g>18.1 on 2021-03-23.31, g=11.9 on 2021-03-25.29.

ASASSN Sky Patrol:
https://asas-sn.osu.edu/sky-patrol/coordinate/76f32d48-1cda-4e50-9977-a092487630cb

3D Dust Mapping with Pan-STARRS 1:
http://argonaut.skymaps.info/query?lon=282.27104167&lat=-19.0345&coordsys=equ&mapname=bayestar2019

IDs:
[I/345/gaia2]
184905.08 -190204.17 Gaia_DR2_4086385340323308544 Plx=-0.0530(0.9408) pmRA=-8.844(1.300) pmDE=-9.787(1.168) G=19.7425(0.0103) BP=20.2119(0.0773) RP=19.1152(0.0906) BP-RP=1.0967

[I/347/gaia2dis]
184905.07 -190204.32 Gaia_DR2_4086385340323308544 rest=4230.28 b=1940.32 B=8043.60 rlen=2044.06

[I/350/gaiaedr3]
184905.07 -190204.18 Gaia_EDR3_4086385340323308544 Plx=-0.8635(0.7014) PM=10.275 pmRA=-5.066(0.730) pmDE=-8.939(0.585) G=19.729692(0.008233) BP=20.234406(0.115447) RP=19.122131(0.056612) BP-RP=1.112274

[I/352/gedr3dis]
184905.07 -190204.33 Gaia_EDR3_4086385340323308544 rgeo=4639.50 rgeob=3007.25 rgeoB=7432.52 rpgeo=8431.49 rpgeob=6964.67 rpgeoB=9878.72

[II/349/ps1]
184905.07 -190204.32 PS1_85152822711278869 g=19.9804(0.0220) r=19.5259(0.0083) i=19.3631(0.0222) z=19.3227(0.0402) y=19.2965(0.0226)