Central Bureau for Astronomical Telegrams
IAUC 8812: Sats OF 2003 AZ_84, (50000), (55637),, (90482); V1281 Sco; V1280 Sco
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Circular No. 8812
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
SATELLITES OF 2003 AZ_84, (50000), (55637), AND (90482)
M. E. Brown and T.-A. Suer, California Institute of Technology,
report the discoveries of four satellites of large transneptunian
objects from observations with the Hubble Space Telescope High
Resolution Camera (+ F606W filter). Observations of (55637) 2002
UX_25 on 2005 Aug. 26.64 UT detected a satellite that was 2.5 +/-
0.2 mag fainter than the primary at a separation of 0".164 +/-
0".003 in p.a. 153 +/- 2 degrees. Observations of (90482) Orcus on
2005 Nov. 13.13 detected a satellite that was 2.7 +/- 1 magnitude
fainter than the primary at a separation of 0".25 +/- 0".01 in p.a.
128 +/- 1 deg. Observations of 2003 AZ_84 on 2005 Dec. 2.99
detected a satellite that was 5.0 +/- 0.3 mag fainter than the
primary at a separation of 0".22 +/- 0".01 in p.a. 321 +/- 2 deg.
Observations of (50000) Quaoar on 2006 Feb. 14.90 detected a
satellite that was 5.6 +/- 0.2 mag fainter than the primary at a
separation of 0".35 +/- 0".01 in p.a. 110 +/- 1 deg.
V1281 SCORPII
H. Naito and S. Narusawa, Nishi-Harima Astronomical
Observatory; and H. Yamaoka, Kyushu University, report that a
low-resolution spectrogram (range 410-670 nm; resolution 1600 at
H_alpha) of the possible nova reported on IAUC 8810 was obtained on
Feb. 21.84 UT with the 2.0-m NAYUTA telescope (+ MALLS). The
spectrum shows a broad H_alpha line with a P-Cyg profile (the FWHM
of the emission component is about 1800 km/s), along with many
other weaker lines, indicating that the star is indeed a classical
nova. A narrow Na I D absorption feature suggests the existence of
considerable interstellar reddening. Yamaoka adds that Y. Fujita
(Kuma-Kogen, Ehime, Japan) made a prediscovery CCD image of the
area of the nova with a Nikon D50 camera (+ 105-mm f/2 camera lens)
on Feb. 18.850, and the nova was not visible to limiting mag 11.6.
N. N. Samus, Institute of Astronomy, Russian Academy of
Sciences, reports that this nova has been given the designation
V1281 Sco.
V1280 SCORPII
C. Buil, Castanet, France, reports that an optical spectrogram
of V1280 Sco obtained on Feb. 20.20 UT using a 0.28-m Schmidt-
Cassegrain telescope (+ Lhires spectrograph) shows an H_alpha P-Cyg
profile and a FWHM of 730 km/s; the intensity of the H_alpha peak
intensity is 2.3 times the local 670-nm continuum. CCD magnitudes
by J. D. West, Mulvane, KS: Feb. 21.467 UT, H = 2.87 +/- 0.06;
21.483, V = 4.73 +/- 0.01.
(C) Copyright 2007 CBAT
2007 February 22 (8812) Daniel W. E. Green
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