Comets discovered in June and July 2016

C/2016 M1 PANSTARRS

Richard Wainscoat and Rob Weryk report the discovery of a comet in images obtained with PANSTARRS telescope at Haleakala on June 22.5 UT, in which the comet appears softer than nearby field stars with a hint of possible asimmetry extended toward p.a. approximately 150 degrees. (CBET 4286).
After the object was posted on the Minor Planet Center's NEOCP and PCCP webpages, other CCD astrometrists like G.Hug, E.Bryssinck and H.Sato, have also noted the object's cometary appearance. 
The available astrometry (spanning June 22-24), the following preliminary parabolic orbital elements by G. V. Williams, and an ephemeris appear on MPEC 2016-M18.

T = 2018 Oct. 26.3330
Peri. = 204.4209
Node  =  81.7478
q = 2.632583 AU
Incl. =  91.7507
e=1.0

Image by Luc Arnold

C/2016 N4 MASTER

An apparently asteroidal object that was found on images taken by a team including O. Gress, V. Lipunov, and eleven others with the MASTER 0.4-m f/2.5 reflector at Tenerife has been found to show cometary appearance on images taken by CCD astrometrists elsewhere. (CBET4291). After the object was posted on the Minor Planet Center's NEOCP webpage, H. Sato, Tokyo, Japan, found the object to show a strongly condensed, round coma 15" in diameter with no tail; L. Buzzi, Varese, Italy, writes that stacked images taken with a 0.60-m f/4.6 reflector on July 17.1 show that the object has a fuzzy appearance (softer respect to stars), with a round coma 15" wide and a possible tail 60" long in p.a. 190 deg.
The available astrometry, the following preliminary parabolic orbital elements by G. V. Williams, and an ephemeris appear on MPEC 2016-O266.

T = 2015 July 17.3090
Peri. = 266.7665
Node= 0.4239
q = 3.028161 AU
Incl. =  53.9423
e=1.0

Image by M.Jager

P/2016 N6 PANSTARRS

R. Wainscoat, R. Weryk, and E. Lilly report the discovery of another with the 1.8-m Pan-STARRS1 telescope on July 14 UT (CBET 4309). After the comet was posted on the Minor Planet Center's PCCP webpage, other CCD astrometrists, as H.Sato, R.Holmes, have also commented on the object's cometary appearance. The available astrometry  appear on MPEC 2016-Q33.

T = 2018 July 18.26881
Peri. = 162.80960
Node  = 298.97277
q = 2.6690885
Incl. = 105.83021
e = 0.9985778