Electronic Telegram No. 5602
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
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Prepared using the Tamkin Foundation Computer Network


2004 VU_75
     A. Thirouin and W. M. Grundy, Lowell Observatory; S. S. Sheppard,
Carnegie Institution for Science; and K. S. Noll, Goddard Space Flight Center,
NASA, report that the trans-Neptunian object 2004 VU_75 has a satellite based
on Hubble Space Telescope (HST) images.  The secondary is offset from the
primary by -0".019 in R.A, and by +0".046 in Decl. on 2024 Oct. 13.27569 UT,
corresponding to a separation of at least 1500 km.  Because the primary and
the secondary are blended, this system may be a close binary or a wide binary
undergoing a mutual events season, while the HST observation occurred during
or close to a mutual event.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2025 CBAT
2025 September 3                 (CBET 5602)              Daniel W. E. Green