ASASSN-17ib: Possible Galactic Nova (12.5 mag) in Scutum

Nucleo de Estudo e Observacao Astronomica - Jose Brazilicio de Souza (Florianopolis, Brazil) (NEOA-JBS)
Fri, 06/23/2017 - 17:52

ASAS-SN Discovery of a Possible Galactic Nova ASASSN-17ib on the Rise

RA = 18:31:45.918 Dec = -14:18:55.57 (J2000.0)

K. Z. Stanek et al.:

ASASSN-17ib 20170613.21 <17.1 ASN

ASASSN-17ib 20170619.41 14.7 ASN

ASASSN-17ib 20170623.47 12.5 ASN

American Association of Variable Star Observers (AAVSO)
ASASSN-17ib is ASASSN-17hx

The object recently announced as ASASSN-17ib had already been published two days ago as ASASSN-17hx.
There is a 19.1 Gaia magnitude star at that position so the outburst has an amplitude of only 7 mag. up to now. Let's see how it evolves.


American Association of Variable Star Observers (AAVSO)
gri.. photometry

According to Arne the best and easiest source for Sloan values is for the user to query APASS 9,, and  manually get the Sloan photometry for the sequence star in question.

I gave it a try and if you use a very small radius like 0.01 degrees, it will usually return just the star in question.

Jim Jones

Sequence Team