親子觀星會

http://d81.blog.jp/archives/69482934.html

https://www.facebook.com/Comets-and-Asteroids-140234731687/

https://twitter.com/KenichiKadota/status/838440976574103552
twitter 有圖 

by Kenichi Kadota from Ageo, Japan on 2017-Mar-03 magnitude m1 = 14.0 with coma diameter 0.8 arc minutes.


http://www.aerith.net/comet/catalog/2017E1/2017E1.html

(http://www.aerith.net/comet/catalog/2017E1/mag.gif)

不是剛發現 ?
現在 亮度就知道 曲線如何了

http://remanzacco.blogspot.tw/2017/03/new-comet-c2017-e1-borisov.html

(https://4.bp.blogspot.com/-Os5pcScL9xA/WLvjjwGRqWI/AAAAAAAACgc/tH3q-iWHdm4lys8qlTXAbdjIB5O6faMfQCLcB/s400/comet_C2017_E1_Borisov.jpg)

M.P.E.C. 2017-E42 assigns the following preliminary parabolic orbital elements to comet C/2017 E1: T 2017 Apr. 9.8; e= 1.0; Peri. =  151.90; q = 0.90;  Incl.= 14.54


CBET nr. 4369, issued on 2017, March 04, announces the discovery of a comet (magnitude ~17) by Gennadii Vladimirovich Borisov on three unfiltered 120-s exposures obtained on Mar. 1.10 UT with a 0.4-m f/2.3 astrograph at the "Mobil Astronomical Robotics Genon" Observatory (MARGO) near Nauchnij. The new comet has been designated C/2017 E1 (Borisov).

C/2017 E1 (Borisov):
2017 Apr. 4.19 UT: m1=8.5, Dia.=5', DC=2, 20 cm SCT (100x).