Copyright © 2020 Kari Laihia, Veikko Mäkelä, Toni Veikkolainen, Christos Oscar Kambiselis, Juha Blad. All rights reserved.
Visibility I / V
The comet C / 2019 K7 (Smith) was filmed on the first night of the October 2020 campaign. British astronomer Ken Smith discovered the comet on May 30, 2019, with the Atlas MLO telescope at the Mauna Loa Observatory in Hawaii. Ken Smith is an astronomer software designer at the Royal Observatory in Belfast and has developed databases including For Pan-STARRS1 telescopes, source ATLAS individuals at https://atlas.fallingstar.com/people.php . Ken Smith has found the asteroid (6478) Gault's tail, he first thought it was a comet, but later revealed to be an active asteroid. The comet was in its perihelion on June 16, 2020, when it was about 4.48au from the Sun, only slightly inside the orbit of Jupiter. When photographing, the comet was 4,570au away and high in the northern sky, the closest to 2,1957au on July 16, 2020. The comet’s orbit has been found to be hyberbolic and is unlikely to enter the interior of the solar system anymore. 1Picture. stacked Summary image according to the stars, motion is not displayed. No asteroids less than 24.0mag in the picture. Tail 11 ", comma 4".
2Picture. first picture measured, 2020-10-09T 19: 15: 21UT 2459132.30232JDUT 18h25m29.92s + 19d11'51.9 "N17.6mag Std Dev 75.915, JPL Horizon 19: 15: 21UT 18h25m29.89s + 19d11'52.0" T16.345 / N17.076 mag.
3Picture. last image measured, 19: 36: 36UT 2459132.31708JDUT 18h25m29.8s + 19d11'51.3 "N17.6mag Std Dev 86.567, JPL Horizon 19: 36: 36UT 18h25m29.78s + 19d11'50.8" T16.345 / N17.076mag. TYC 1569-710-1 11.23mag stars used to calibrate brightness measurement.
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COBS.si:n mukaan kirkkaus oli 15-16 mag havantohetkellä.
Kiitos tarkennuksesta. COBS on kokonaiskirkkauksen suhteen oikeassa, onhan pyrstökin selkeä. Ytimen kirkkausmittauksenikin on linjassa ehkä hieman himmeämpi ennustetta.