C/2018 Y1 Iwamoto
Closest to Sun on 2019 Feb 6 at 1.28AU
Closest to Earth on 2019 Feb 12 at 0.30AU
Maximum possibly Magnitude 7.5 in Feb 2019
Period NA

A mere 40 days after his co-discovery of C/2018 W1 Machholz-Fujikawa -Iwamoto, Mr Masayuki Iwamoto of Awa, Tokushima, Japan discovered another comet on December 18 using a 10cm f/4 Pentax telephoto lens and Canon 6D camera. Who says that amateur discoveries are no longer possible!
The comet was situated low in morning twilight, but better situated for southerners, so this opportunity went begging for the southern comet hunter.
Conditions for this apparition are very good, with the comet reaching perihelion and perigee within a week of each other.
It will rapidly move into the evening sky during February and become visible in binoculars, peaking at magnitude 7.5 around mid-month.
As February begins, you will find the magnitude 9.0 comet situated in Virgo, about 6 degrees west of Spica, rising at about 11pm but best observed after midnight. Since the orbit is retrograde, it will rapidly approach and recede from the Earth, so the observing window will be rather short.
On the morning of Feb 5, the now magnitude 8.2 comet is within 30' of galaxies NGC 4487 and NGC 4504 in Virgo.
On the evening of Feb 12, the now magnitude 7.5 comet is within a degree of Eta Leonis. Movement will be noticeable as it treks westerley at 18' per hour. Moonlight will start to interfere with evening observing and it is best to wait until local moonset to observe the comet.
On the morning of Feb 14, the comet will be within 1 degree of magnitude 9.6 galaxy NGC 2808 in Leo
On the evening of Feb 18, the comet is very near Castor in Gemini.
By Feb 22, moonlight no longer interferes with evening viewing and you will find the now magnitude 8.5 comet situated in Auriga.
On Feb 27-28, you will find the now magnitude 9.5 comet situated between the star clusters M38 and M36 in Auriga.

 


C/2018 Y1 Iwamoto and Galaxy NGC2903.
2019 Feb 13 at 14:10UT.
Visual observation: m1= 6.4, Dia=20, DC=4/...8x40mm Binoculars
Comet at peak brightness.
 


C/2018 Y1 Iwamoto
2019 Feb 1 at 13:45UT.
Visual observation: m1= 7.9, Dia=10, DC=4...25x100mm B [Michael Mattiazzo, at Stockport, South Australia]

New comet C/2018 Y1 Iwamoto. 2019 January 1.
large aperture photometric V mag =11.5.