(cba:news) ATO J104.6895+17.0332: possible recovery of the 1892 nova? (=NSV 3313)

Joe Patterson jop at astro.columbia.edu
Fri Aug 28 04:20:45 EDT 2020

Hi CBAers,

As usual, a nice piece of detective work by Taichi.  A tad too early in 
the season, but... if you have a clear view to the east, put it on your 
list!  Exploring these OLD "old novae" (or in this case, candidates) is 
one of our ongoing high-priority subject areas.

Speaking of which, V Per (1887 nova) is another, much better placed for 
the borealites among us.  It's quite faint (18.5?) but the two things 
we're interested in (orbital waveform and eclipse timing) are not 
terribly demanding.  The eclipses are pretty deep (20th mag?) but fear 
not - with P~2 hour, there are a lot of them, and one can use the 
waveform near eclipse (rise/fall) to define mid-eclipse with passable 

CI Aql and Nova Sco 1437 also continue to be high-priority targets, 
still seasonally appropriate.

joe p

-------- Forwarded Message --------
Subject: [vsnet-alert 24603] ATO J104.6895+17.0332: possible recovery of 
the 1892 nova? (=NSV 3313)
Date: Fri, 28 Aug 2020 11:10:35 +0900
From: Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>
To: variable_star_forum at yahoogroups.com, 
vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp, vsnet-alert at yahoogroups.com

ATO J104.6895+17.0332: possible recovery of the 1892 nova? (=NSV 3313)

ASAS-SN data:

    I found a period of 0.477906(2) d with minima of
different depths in one cycle.

065845.488 +170159.74 (2000.0) Gaia_DR2_3361199697425899008 
plx=0.164(0.065) dismod=13.9 pmra=-0.029(0.121) pmdec=-1.322(0.097) 
G=15.604 BP=15.760 RP=15.355

    The Gaia color is too blue for a W UMa star.

Also detected as a variable:
065845.4 +170159 (2000.0) PS1RRJ065845.48+170159.8 RR g=15.21(0.47) 
P=0.31424 0.03/0.32
    The location is sufficiently close to the suspected
nova in 1892 and this object would be the quiescent
counterpart.  Spectroscopy is desired.

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