[en] E. Jehin, M. Ferrais, Y. Moulane, F. Pozuelos, and J. Manfroid, STAR Institute, University of Liege report on observations of this minor planet (cf. CBET 4594, 4597) performed with the two 0.6-m TRAPPIST telescopes (at the Oukaimeden Observatory, Morroco, and at La Silla, Chile; cf. Jehin et al. 2011, Messenger 145, 2). Five photometric series of 120-s CCD exposures, totalling about seven hours, were obtained with a R_c filter with a resolution of 0".65/pixel, on four clear nights between Jan. 12 and 21. All of the light curves are flat, and the magnitude is constant over the nine days of observations (R_c = 17.5 +/- 0.1) and did not allow derivation of a rotation period. On Jan. 26 UT, when observations resumed after an interuption of five days due to the moon, a short tail was observed to the north of the long tail noted by other observers previously, possibly corresponding to a new activity event. This second tail has been confirmed on Jan. 28 with a long series of forty images under darker conditions. In stacks of ten images, the long tail extends to 5'30" in p.a. 295 degrees, while a shorter (15") and brighter tail is also now observed at p.a. 302 deg; a magnitude of R_c = 17.6 +/- 0.1 for the minor planet itself was measured. The magnitude is the same as before, so no outburst is detected. The point-spread function of (6478) was found to be the same as for nearby stars in all the observations and using different filters (B, V, R, and I). No coma is detected at this resolution. <P />H. Sato, Tokyo, Japan, found a straight tail 3'.1 long toward p.a. 292 degrees on images obtained on Jan. 8.65-8.66 UT with an iTelescope 0.51-m f/6.8 astrograph at Siding Spring, NSW; the head appeared stellar and yielded magnitude 18.1 as measured within a circular aperture of radius 4".9. <P />F. Kugel, Dauban, France, reports that thirty stacked 30-s CCD images of (6478) taken with a 0.28-m f/2.2 telescope during Jan. 10.17-10.24 UT show a tail around 2'.5 long in p.a. 292.5 deg; the head showed a stellar appearance with V magnitude 17.4 in a 10".8 aperture; he has posted an image that is viewable via website URL https://tinyurl.com/y9u6zv3x. <P />J.-F. Soulier, Dauban, France, relates that unfiltered CCD images taken with a 0.20-m f/4 Newtonian reflector on Jan. 11.1-11.2 UT show a tail about 5'.4 long in p.a. 295 degrees, with the suggestion of a coma 22" in size; he measured magnitude 17.5 in an aperture of radius 6".6. <P />L. Buzzi, Varese, Italy, writes that stacked CCD images totalling 29 minutes of exposure time were taken in good transparency but mediocre seeing on Jan. 11.14-11.16 UT with a 0.84-m f/3.5 reflector, showing a stellar head with a dust trail at least 130" long in p.a. 292 degrees, but possibly extending up to 210". <P />Unfiltered CCD images taken by A. Maury, J.-B. de Vanssay, and J.-F. Soulier with a 0.4-m f/5 Ritchey-Chretien reflector at San Pedro de Atacama, Chile, on Jan. 13.26-13.33 and 14.29-14.37 yield magnitude 17.4 in an aperture of radius 6".7. A coma of size about 11" and a tail about 4'.3 long in p.a. 291.7 deg was measured on Jan. 13.3; a coma of size about 12" and a tail 4'.15 long in p.a. 289.8 deg was measured from the Jan. 14 images.
