C/2023 H2 (Lemmon)

[peter]

C/2023 H2 (Lemmon)

http://astro.vanbuitenen.nl/comet/2023H2
http://www.aerith.net/comet/catalog/2023H2/2023H2.html


https://www.facebook.com/photo.php?fbid=10160593747227931&set=p.10160593747227931&type=3

[peter]

C/2023 H2 (Lemmon)目前多个报告亮度9等左右，比预报亮3等，但是凝聚度比较低，彗发大而弥散，将于11月10日前到达0.19AU的近地点，未来近遇较亮深空天体的情况如下，可供拍摄参考：
1.最小角距离 C/2023 H2 Lemmon and M106
日期 (UT)                      角距             赤纬    日彗角距
2023 十月 14 01:23  0°27' 35"  +46°45'  56.1° 
2.最小角距离 C/2023 H2 Lemmon and M51
日期 (UT)                       角距            赤纬    日彗角距
2023 十月 28 21:14  2°48' 45"  +49°52'  63.8° 
3.最小角距离 C/2023 H2 Lemmon and M101
日期 (UT)                      角距             赤纬    日彗角距
2023 十月 31 18:58  4°09' 05"  +50°05'  64.4° 
4.最小角距离 C/2023 H2 Lemmon and M13
日期 (UT)                        角距            赤纬    日彗角距
2023 十一月 07 18:26  3°58' 56"  +39°44'  63.0° 
5.最小角距离 C/2023 H2 Lemmon and M92
日期 (UT)                         角距           赤纬    日彗角距
2023 十一月 07 23:29  5°23' 21"  +38°47'  63.0°

 https://weibo.com/1029143002/Nm6Vu9kcz?type=repost

[peter]

https://www.facebook.com/photo/?fbid=2270788023107235&set=gm.6411004722341201&idorvanity=455870324521367 

Mitsunoi Tsumura

C/2023 H2 & M106

[peter]

 C/2023 H2 (Lemmon) 
Comet H2 Lemmon in November

6-Crosses into the constellation Hercules.

7-Passes near the +4.2 magnitude star Phi Herculis.

8-Photo Op: Passes near the +4.2 magnitude star Sigma Herculis, and 4 degrees from the globular cluster Messier 13 and 3 degrees from the globular cluster Messier 92.

9-Passes just 10’ from the +3rd magnitude star Pi Herculis.

10-Passes near the +3.7 magnitude star Xi Herculis and passes 0.19 AU from the Earth, perhaps reaching a peak brightness of +5 magnitude.

11-Passes near +4 magnitude star Zeta Aquilae and the +3rd magnitude star Epsilon Aquilae, and moves in to the constellation Aquila.

12-Crosses the galactic plane southward.

13-Crosses the celestial equator southward.

15-Crosses into the constellation Capricornus.

17-Crosses the plane ecliptic southward.

19-The 45% illuminated, waxing crescent Moon passes less than 4 degrees from the comet.

20-Nicks the corner of the constellation Microscopium.

21-Crosses into the constellation Piscis Austrinus.

29-Crosses into the constellation Grus.

https://www.universetoday.com/164011/comet-h2-lemmon-brightens-in-early-november-ahead-of-expectations/