Central Bureau for Astronomical Telegrams
IAUC 9282: S/2016 (107) 1; V1655 Sco = N Sco 2016 = PNV J17381927-3725077
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Circular No. 9282
Central Bureau for Astronomical Telegrams
New postal address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
CBATIAU@EPS.HARVARD.EDU ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
S/2016 (107) 1
M. Marsset, Laboratoire d'Astrophysique de Marseille; B. Carry,
Observatoire de la Cote d'Azur; B. Yang, European Southern
Observatory (ESO); F. Marchis, Carl Sagan Center, SETI Institute; P.
Vernazza, Laboratoire d'Astrophysique de Marseille; C. Dumas,
Thirty-Meter Telescope; and J. Berthier and F. Vachier, Institut de
Mecanique Celeste et de Calcul des Ephemerides, report the
discovery of a second satellite around minor planet (107) Camilla.
This known binary system was observed on five epochs between 2015
May 29 and 2016 July 30 UT with the SPHERE instrument at the ESO
8-m Very Large Telescope UT3 on Cerro Paranal. On 2015 May 29.215
UT, the YJH band (0.97- to 1.66-micron) IFU spectral cubes returned
the following position for the second companion: separation 0".18
+/- 0".01 (projected separation 340 km) and p.a. 320 +/- 2 deg, and
a non-sidereal motion similar to that of (107): in terms of
(R.A.)(cos Decl.), -0".40/min; and in Decl., +0".09/min. On 2016
July 12.218 UT, the new satellite was found at separation 0".30 +/-
0".01 and p.a. 67 +/- 1 deg, and on 2016 July 30.073, it was at
separation 0".31 +/- 0".01 and p.a. 70 +/- 1 deg. The new
satellite could not be detected during observations carried out
with the same instruments on 2016 July 2 and 28. Based on the
three detections, the mean YJH-band magnitude contrast between (107)
and its new companion is 9.0 +/- 0.3. The already known satellite
of (107), discovered in 2001 (cf. IAUC 7599), is detected on the
five epochs with a separation varying from 0".25 to 0".59. Minor
planet (107) becomes the sixth triple system discovered and imaged
in the main asteroid belt after (87) Sylvia (IAUC 8582), (45)
Eugenia (IAUC 8817), (216) Kleopatra (IAUC 8980), (93) Minerva
(IAUC 9069), and (130) Elektra (CBET 4036).
V1655 SCORPII = NOVA SCORPII 2016 = PNV J17381927-3725077
As first announced on CBET 4285, H. Nishimura (Kakegawa, Japan)
discovered an apparent nova (mag 12.4) on CCD frames taken on June
10.629 UT using a 200-mm-f.l. f/3.2 lens; the new object's position
was measured to be R.A. = 17h38m19s.27, Decl. = -37o25'07".7
(equinox 2000.0). The variable was designated PNV J17381927-3725077
when it was posted at the Central Bureau's TOCP webpage. K.
Itagaki, Yamagata, Japan, estimated the variable to be at mag about
10.4 on June 11.506, with position end figures 19s.22, 07".8
(0.50-m reflector). Spectroscopy by K. Ayani (Bisei Astronomical
Observatory 1.01-m telescope) on June 11.65 showed the star to be a
nova in an early phase. Additional details appear on CBET 4285.
E. Kazarovets and N. Samus note that the permanent GCVS designation
V1655 Sco has been assigned to this variable.
(C) Copyright 2016 CBAT
2016 August 7 (9282) Daniel W. E. Green
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