[IAUC] IAUC 9259: JUPITER I (IO); PERMANENT DESIGNATIONS OF 2012 MILKY WAY NOVAE [25139-2012/04-R1]

Mar Sep 3 19:33:56 ART 2013

                                                  Circular No. 9259
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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CBATIAU en EPS.HARVARD.EDU           ISSN 0081-0304
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Prepared using the Tamkin Foundation Computer Network


JUPITER I (IO)
     Imke de Pater and Mate Adamkovics, University of California at
Berkeley; and Ashley G. Davies, Jet Propulsion Laboratory,
California Institute of Technology, report the discovery of a large
volcanic eruption on Jupiter I (Io) at location 230 deg W, 29 deg N.
The only previous detection in the vicinity was with the NIMS
instrument on the Galileo spacecraft, which saw a very small hot
spot at this position in Oct. 2001.  These new observations were
obtained with the near-infrared camera NIRI on the 8-m Gemini
telescope (+ adaptive-optics system ALTAIR) on Mauna Kea around
Aug. 29.646 UT.  Io was observed at 3.8 microns, and a radiant flux
of at least about 1.5 TW/micron (perhaps up to 6 TW/micron when
including a limb correction) was measured, suggesting a total power
output of around 15-60 TW.  This is at least three times more
powerful than the large Aug. 15 eruption at Rarog Patera that was
announced by the same team on CBET 3632.  "Outburst" eruptions like
these are extremely rare, and the discovery of two in a 2-week
period is unprecedented.  In both cases, the eruptions have greatly
subsided over a 1- to 2-week period.  This rapid variability makes
a strong case for continuing the monitoring of Io in order to
characterize, quantify, and therefore understand the underlying
patterns of force driving this satellite's extraordinary volcanic
activity.  This and the Rarog Patera eruption are particularly
timely, as they have occurred just prior to the launch of the
Extreme Ultraviolet Spectroscope for Exospheric Dynamics (EXCEED)
telescope onboard the Japanese Space Agency satellite SPRINT-A
(likely due to be launched in mid-Sept.).  EXCEED will observe the
Io plasma torus for about 6 months, providing an excellent
opportunity to investigate how variations in the Io plasma torus
may be triggered by Io's volcanic activity, and especially by this \
particular type of large, powerful eruption.


PERMANENT DESIGNATIONS OF 2012 MILKY WAY NOVAE
     N. N. Samus reports the following permanent GCVS designations
of novae that were assigned TOCP designations and announced on
(CBETs during 2012:
V2676 Oph = PNV J17260708-2551454 = N Oph 2012 (CBET 3072);
V5589 Sgr = PNV J17452791-2305213 = N Sgr 2012 No. 1 (CBET 3089);
V5590 Sgr = PNV J18110375-2717276 = N Sgr 2012 No. 2 (CBET 3140);
V5591 Sqr = PNV J17522579-2126215 = N Sgr 2012 No. 3 (CBET 3156);
V5592 Sgr = PNV J18202726-2744263 = N Sgr 2012 No. 4 (CBET 3166);
V5593 Sgr = PNV J18193700-1907400 = N Sgr 2012 No. 5 (CBET 3182);
V959 Mon = PNV J06393874+0553520 = N Mon 2012 (CBET 3202);
V1724 Aql = PNV J18523496-0018423 = N Aql 2012 (CBET 3273).

                      (C) Copyright 2013 CBAT
2013 September 3               (9259)            Daniel W. E. Green