親子觀星會

C/2017 E4 LOVEJOY 開始變暗


==

http://www.minorplanetcenter.net/mpec/K17/K17E86.html


https://www.sott.net/article/345153-New-Comet-C-2017-E4-LOVEJOY
CBET nr. 4373, issued on 2017, March 13, announces the discovery of a comet (magnitude ~15) by Terry James Lovejoy on three CCD 8-s exposures taken five minutes apart starting on Mar. 9.684 UT with a Celestron C14 reflector operating at f/1.9 (+ QHY9 camera). The new comet has been designated C/2017 E4 (LOVEJOY).

(https://www.sott.net/image/s19/383497/large/comet_C2017_E4_Lovejoy.jpg)

恭喜  又發現彗星

希望會是很亮

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/26358

http://www.astro-forum.cz/viewtopic.php?t=21684

https://www.britastro.org/node/9356

(https://www.britastro.org/sites/default/files/TJL006_20170311_050814_Angel.jpg)


http://www.astro-forum.cz/viewtopic.php?t=21684

 Perihelion 2017 Apr 23.983223

http://www.cometwatch.co.uk/terry-lovejoy-discovers-comet-c2017-e4/


http://www.skyandtelescope.com/observing/comet-41pt-g-k-glows-green-for-st-paddys-day/

(http://www.skyandtelescope.com/wp-content/uploads/Lovejoy-March-April_box.jpg)

New Comet C/2017 E4 (Lovejoy) arcs from eastern Sagittarius to Andromeda between now and mid-April.
The comet may brighten to magnitude +9.

Positions are plotted every 3 days at 5:30 a.m. EDT. Stars are shown to magnitude +6.5.

https://groups.yahoo.com/neo/groups/CometObs/conversations/messages/7068

C/2017 E4 (Lovejoy):
2017 Mar. 20.21 UT: m1=8.6, Dia.=4.5', DC=3, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM : 20.8 at zenith.
Significantly brighter than expected. Wide and diffuse coma. Followed
for 40 min. Motion obvious. Some moonlight interference (phase 0.54).
Altitude: 13 deg. Limiting star magnitude near comet: 12.5 (APASS).
Field stars checked in DSS. Mountain location, very clear sky.].

( Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W ).

只是亮度多少不確定

IAU 觀測資料亮度 15.7~17.8:
http://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=C/2017%20E4

15等是 lovejoy 發現時星星等拉

目前靠近中 , 亮度有一說最靠近時可能最亮 9 .
不過一直沒看到曲線 .


FACEBOOK
https://www.facebook.com/groups/564399700347004/



(https://scontent-tpe1-1.xx.fbcdn.net/v/t1.0-9/17264531_988476204622567_454241098227792630_n.jpg?oh=c1203e0ca9f70ef7d52b7fd2d5d26461&oe=5960F18B)


可能 11~11.5 吧

https://www.facebook.com/photo.php?fbid=1390358494379779&set=gm.1276707699116197&type=3&theater


(https://scontent-tpe1-1.xx.fbcdn.net/v/t1.0-9/17362355_1390358494379779_206610710274576380_n.jpg?oh=2600e5c1e016b103a41a3e109e634247&oe=595C66CB)

http://www.aerith.net/comet/catalog/2017E4/mag.gif

(http://www.aerith.net/comet/catalog/2017E4/mag.gif)



(http://www.aerith.net/comet/catalog/2017E4/chart1.gif)


(http://www.aerith.net/comet/catalog/2017E4/chart2.gif)

http://www.universetoday.com/134662/see-mercury-at-dusk-a-new-comet-at-dawn/

(http://www.universetoday.com/wp-content/uploads/2017/03/Lovejoy-March-27.jpg)

(http://www.universetoday.com/wp-content/uploads/2017/03/Lovejoy-path-March-April-BW.jpg)

4/1 過 M15  不是 M5 吧

 

http://www.virtualtelescope.eu/2017/03/29/comet-c2017-e4-lovejoy-image-29-mar-2017/
 16″-f/3.75 Tenagra III (“Pearl”) robotic unit part of Tenagra Observatories in Arizona

(http://www.virtualtelescope.eu/wordpress/wp-content/uploads/2017/03/c2017e4_28march2017_median_average-640x766.jpg)

一說  7~8等間
但這應該 沒光害地吧 ..

應該 比8等還暗吧
有人說雙統可見
https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/26442

4/19 ~靠近 M31

不過有月光

http://www.itelescope.net/sky-alerts/2017/3/30/alert-comet-c2017-e4-lovejoy-is-in-outburst.html

(http://www.itelescope.net/storage/Lovejoy_Mar-Apr_Chart.png?__SQUARESPACE_CACHEVERSION=1490879423209)

尾巴開叉了嗎 ???

http://www.virtualtelescope.eu/2017/03/30/comet-c2017-e4-lovejoy-image-30-mar-2017/

(http://www.virtualtelescope.eu/wordpress/wp-content/uploads/2017/03/c2017e4_30mar2017_median-640x473.jpg)

http://www.skyandtelescope.com/observing/comet-lovejoy-brightens-quickly-heads-north/


(http://www.skyandtelescope.com/wp-content/uploads/Lovejoy-April-daily-map_deepsky.jpg)


A faint ion tail extends for more than 1° in this photo taken on March 30. Note the comet's flattened coma shape. North is up and east left.

(http://www.skyandtelescope.com/wp-content/uploads/Lovejoy-G-Rhemann-March-30-colorST.jpg)

==

http://www.cobs.si/analysis2?comet_id=1661&plot_type=0

(http://www.cobs.si/temp/lightcurve_20170331-073458.png)

亮度接近肉眼可見的極限…

但是 只有最近因為

馬上就遠離地球了

亮度應該會很快變暗的

http://195.209.248.207/en/observation/listObserv/1473

http://astroblogger.blogspot.tw/2017/03/seeing-comet-c2017-lovejoy-from.html


(https://3.bp.blogspot.com/-KGZTWsDsLHA/WN4OEfuxJmI/AAAAAAAAPJ8/upLRVeU2iUUvGSE_oTj5_FQjmdHAhKvYwCLcB/s1600/Lovejoy_April_SH.png)


(https://3.bp.blogspot.com/-QJztfan4IHE/WN4Pj8mqlRI/AAAAAAAAPKI/1s5D-KgneegEtHaaXvMEbxISWuZNhjIAACLcB/s1600/Lovejoy_binoc_chart.png)

http://www.virtualtelescope.eu/2017/03/30/comet-c2017-e4-lovejoy-image-30-mar-2017/

(http://www.virtualtelescope.eu/wordpress/wp-content/uploads/2017/03/c2017e4_30mar2017.gif)

甘醫生拍

https://www.facebook.com/photo.php?fbid=1276429262478043&set=pcb.1276429382478031&type=3&theater

(https://scontent-tpe1-1.xx.fbcdn.net/v/t1.0-9/17425851_1276429262478043_5215055822760095796_n.jpg?oh=73b7610f73043b09c7a6aad3d301f189&oe=5950DF5A)


==
王朝拍
Lovejoy彗髮很密但是沒什麼尾
Megrez 80, D800 (modified), ISO1600, 1 min w dark sky B1-filter
https://www.flickr.com/photos/45594847@N07/33793467915/in/dateposted-public/

http://spaceweathergallery.com/indiv_upload.php?upload_id=134497&PHPSESSID=lujpttlr5tp92ct37kc03tbcd3
Taken by Graziano Ventre on April 3, 2017 @ Postazione Via Lattea Bellagio Italy
(http://0e33611cb8e6da737d5c-e13b5a910e105e07f9070866adaae10b.r15.cf1.rackcdn.com/Graziano-Ventre-C-2017-E4-Lovejoy-004_1491199466_lg.jpg)

http://www.virtualtelescope.eu/2017/04/03/comet-c2017-e4-lovejoy-awesome-movie-03-apr-2017/

(http://www.virtualtelescope.eu/video/c2017e4_03april2017.gif)

https://www.universetoday.com/134848/surprise-comet-e4-lovejoy-brightens/

現在才出新聞

https://www.facebook.com/photo.php?fbid=1279892382131731&set=a.103821636405484.4761.100003329437162&type=3&theater

甘醫生

2017-0402 04:53
Takahashi ε-180ED+Canon 6D(mod) on SXP w Kowa 100mm+Lacerta M-Gen, ISO 1600, 180sec single.
(https://scontent-tpe1-1.xx.fbcdn.net/v/t1.0-9/17799966_1279892382131731_5958358525560134925_n.jpg?oh=107a554f73daea64263d2b7dc37535a8&oe=598EDD8C)

zoar

Comet C/2017 E4 (Lovejoy)
4/4 AM4:20
ISO1600x2minx4
with STC多波段光害濾鏡（Astro-Multispectra Filter）
拍攝地 : 台北市小油坑

(https://scontent-tpe1-1.xx.fbcdn.net/v/t1.0-0/q92/s480x480/17796265_10208990232649389_1639137486252996959_n.jpg?oh=cc7aa58c23c93b88dff422d750d78ef3&oe=595CC5D0)

這個曝了40分鐘 (寶二，單張2min，ISO1600，配合dark sky-B1輕光害濾鏡)
還好V2動的很慢，疊圖時不用彗星疊合也沒差

http://www.comet-astronomy.com/comet-c2017-e4-lovejoy-prospect/

(http://www.comet-astronomy.com/wp-content/uploads/2017/04/lovejoy-lc1.png)

C/2017 E4 LOVEJOY 開始變暗?

有人說


==

http://news.nationalgeographic.com/2017/04/skywatching-four-green-comets-space-science/



https://in-the-sky.org/data/comets.php

update

http://www.virtualtelescope.eu/2017/04/14/comet-c2017-e4-lovejoy-image-14-apr-2017/

Comet C/2017 E4 Lovejoy: 14 Apr. 2017
(http://www.virtualtelescope.eu/wordpress/wp-content/uploads/2017/04/c2017e4_14april_pearl_2x2-640x531.jpg)

60-seconds exposures, unfiltered, remotely taken with the 16″-f/3.75 Tenagra III (“Pearl”) robotic unit part of Tenagra Observatories in Arizona. The telescope tracked the apparent motion of the comet. The imaging camera is based on the KAF-16801 CCD, used in 2×2 binnin

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/26532

(http://www.britastro.org/cometobs/2017e4/2017e4_20170418_0245_dgb.jpg)

http://astronomiecyrille.over-blog.com/2017/04/comet-c/2017-e4-lovejoy-le-19/04/2017.html?utm_source=_ob_share&utm_medium=_ob_facebook&utm_campaign=_ob_share_auto

(http://img.over-blog-kiwi.com/2/22/38/40/20170419/ob_4f5474_e41904negweb.jpg)
彗星開始解體 ??

UPDATE

http://www.virtualtelescope.eu/2017/04/24/comet-c2017-e4-lovejoy-image-24-apr-2017/