親子觀星會

 

COMET C/2017 S3 (PANSTARRS)變亮

==
COMET C/2017 S3 (PANSTARRS)


https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/26753
Hi Folks,
 
Very interesting orbit for this object on the possible comet confirmation page.
16 observations over an orbital arc of 1.9 days shows a perihelion distance of 0.16AU in October 2018.
If i constrain e=1, I get 0.27AU in mid September 2018.
More observations are encouraged but the current magnitude is quite faint (m=20).
let’s hope the orbit holds true.
 
cheers,
Michael Mattiazzo



http://www.starlab.ru/showthread.php?s=cb308459c81df12189d14a707683f522&p=525700#post525700
(http://www.starlab.ru/attachment.php?attachmentid=163800&d=1506537502)


亮度會到多亮???

https://www.facebook.com/140234731687/photos/a.155712931687.126632.140234731687/10154711019546688/?type=3&theater

(https://scontent.ftpe7-2.fna.fbcdn.net/v/t1.0-9/21766738_10154711019546688_705042524014706078_n.jpg?oh=0667edf1301712c0f478389d9c067678&oe=5A43904F)


New comet C/2017 S3 (PANSTARRS) was discovered 2017-Aug-17 at magnitude 21.8 by the Pan-STARRS survey team J. Bulger, T. Lowe, A. Schultz, M. Willman, K. Chambers, S. Chastel, L. Denneau, H. Flewelling, M. Huber, E. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk using the 1.8-m Ritchey-Chretien Pan-STARRS 1 survey telescope on Haleakala. MPEC 2017-S160: COMET C/2017 S3 (PANSTARRS)

The object's retrograde orbit is inclined 99 degrees from the ecliptic with the object currently at 4.9 AU from the sun.

https://exospace.cz/nadejna-nova-kometa-c-2017-s3-panstarrs/

2018年8月16日 好像靠近太陽最亮 3等
 不過 可能離太近無法拍

日本這邊說8月初可以到5等多 
http://www5c.biglobe.ne.jp/~starlit/panstarrs2017s3.htm
パンスターズ彗星 C/2017 S3(PanSTARRS)
(http://www5c.biglobe.ne.jp/~starlit/panstarrs/img13.png)

http://www.aerith.net/comet/catalog/2017S3/2017S3.html

(http://www.aerith.net/comet/catalog/2017S3/mag.gif)

FB


46p 
https://www.facebook.com/photo.php?fbid=1677641082255934&set=p.1677641082255934&type=3&theater

https://www.cloudynights.com/topic/607745-c2017-s3-panstarrs/

Maybe magnitude +4 around August 15. Close to the Sun.

好像目前還15等太暗

未來會如何不知道  看8月吧

https://www.cloudynights.com/topic/616649-alpo-comet-news-for-may-2018/

聽說變亮

 2017 S3 3mag brighter than on june 30

https://groups.yahoo.com/neo/groups/comets-ml/conversations/topics/27103

https://twitter.com/telescopecomet1

stellarium

 https://www.facebook.com/photo.php?fbid=2238747082817165&set=p.2238747082817165&type=3&theater&ifg=1

Yu-Peng Chan

2018-07-02 17:00 ( GMT+8)
2018-07-02 03:00 (CDT)

https://www.facebook.com/photo.php?fbid=2238808242811049&set=gm.1811678322222323&type=3&theater

Yu-Peng Chan


2018-07-02 (初十九) 17:00 ~ 18:00 (GMT+8)
300s*6 2張馬賽克
高橋FSQ-106ED+SBIG 11000M+Paramount ME
iTelescope NMS Remote Obs.
----------------------
初估亮度為9等

(https://scontent.ftpe7-1.fna.fbcdn.net/v/t1.0-9/36528700_2238808249477715_2958009341862477824_n.jpg?_nc_fx=ftpe7-3&_nc_cat=0&oh=4a375267d4a9563aa6fe4a8573e6d45b&oe=5BA1E32A)

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/27122

(http://spaceweathergallery.com/full_image.php?image_name=michael-jAcger-2017S320180703RGBut2330_1530640624.jpg)

https://www.skyandtelescope.com/observing/4th-of-july-fireworks/

(https://www.skyandtelescope.com/wp-content/uploads/S3-every-3-days-July-2018.jpg)

https://www.youtube.com/watch?v=sSbjTggUzFA

夠亮肉眼都能看到

https://www.ast.cam.ac.uk/~jds/

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/27139  

C/2017 S3 (PANSTARRS) dramatically changed after outburst

 It becomes much diffuse and bigger quickly. Now it is not so easy object for 15-cm telescope as few days ago.

TWITTER COMET

https://twitter.com/hashtag/comet

https://twitter.com/vivstoitsis/status/1015514636349685761
Con Stoitsis

Comet C/2017 S3 Panstarrs has brightened to mag 9. Image from Jost Jahn only a few hours ago.
(https://pbs.twimg.com/media/DhfVLMqVQAEvXOf.jpg)

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/27149

 disintegration of a comet

disintegration  ??

(http://spaceweathergallery.com/full_image.php?image_name=Michael-Jaeger-2017S320180713GIFauf12_1531473970.gif)

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/27159

(http://www.astromania.co.uk/2017S3_20180714_2358_PCarson.jpg)

https://www.skyandtelescope.com/observing/panstarrs-comet-rocked-by-outburst-now-binocular-bright/

(https://www.skyandtelescope.com/wp-content/uploads/S3-Stellarium_v2.jpg)

TWITTER

https://cieloprofundo.net/2018/07/15/cometa-c-2017-s3-panstars-2/

https://aboutspacejornal.net/2018/07/17/%D0%BA%D0%BE%D0%BC%D0%B5%D1%82%D0%B0-c-2017-s3-panstarrs-%D1%81%D0%B0%D0%BC%D0%B0%D1%8F-%D1%8F%D1%80%D0%BA%D0%B0%D1%8F-%D0%BD%D0%B0-%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9-%D0%BC%D0%BE%D0%BC/

到目前為止，沒有證據表明它已解體  

在接下來的幾天裡，它的搜索參考對象  可以使用
   4 Cam（+5.3等星），5 Cam（+5.5等星），7 cam（+4.4 等）和Auriga三角洲（+3.7 等VHF）。

隨著彗星向南移向太陽，其能見度每天都在惡化

C / 2017 S3（PANSTARRS）將於2018年8月15日距離 太陽僅有0.21 AU
在近日點將比水星更接近 太陽
彗星能不能活下來還不知道

ISON  距離 太陽僅有  0.0124 AU 還不知  0.21 AU 會如何
池谷－關彗星 距離 太陽  0.007778 (B) AU

從7月31日至8月14日彗星應該是的在 STEREO SECCHI HI1-A的領域可見 （如不解體，足夠亮）。
並且從8月24日到9月13日在 coronagraph SOHO LASCO C3的視野中

https://www.facebook.com/NBObservatories/posts/c-2017-s3-(panstarrs)-in/2053710494663811/

C/2017 S3 (PANSTARRS) in outburst, 30 days before perihelion

The outburst that started on July 15th is still developing. Last night, the comet was slightly brighter and a lot larger than the night before, approaching +8 mag with a coma diameter of about 8 arcminutes. The bright central condensation is still present, indicating that the nucleus is still intact. The thin tail is visible, but difficult due to star interference.
C/2017 S3 will reach perihelion on August 15th, at a distance of only 0.21 AU from the Sun. It is not expected to survive beyond perihelion.
The comet is now moving closer to the Sun in our sky. It will become unobservable in late July.

Photometry (APASS V magnitude unfiltered, 242" aperture radius): m1 = 8.5 +/- 0.1 mag
Nuclear magnitude (Gaia G magnitude unfiltered, 8" aperture radius): m2 = 12.3 +/- 0.1 mag
Bright central condensation, outer coma 8.1 arcminutes in diameter, circular
Larger and slightly brighter than on 16 July 2018
Thin tail 4.5 arcminutes long in PA 288° (interference from background star)
Comet altitude 26.1°

Measurement in ICQ format:
2017S3 2018 07 17.02 C 8.5 AQ 25.4Y 7A360 8.1 4.5m288 ICQ XX BAMaaI C 8.05mG2x ICY KPR 0 U9*0.09 2.1s 2.1

FACEBOOK
Yu-Peng Chan

2018-07-18 18：00 (GMT+8)
0.4m Class Telescope 180s L


https://www.facebook.com/photo.php?fbid=2272089522816254&set=p.2272089522816254&type=3&theater

(https://scontent.ftpe8-3.fna.fbcdn.net/v/t1.0-9/37312711_2272089529482920_992388597883600896_n.jpg?_nc_cat=0&oh=3b8c325ca742c2fb9928b7a78b0488ee&oe=5BCC6AD6)

此彗星的離心率為1，屬於拋物線軌道！粉多大 彗星都屬於此類離心率…期待9月的夜空！

https://groups.yahoo.com/neo/groups/CometObs/conversations/messages/7411

Juan Jose Gonzalez
Today at 4:49 AM
C/2017 S3 (PANSTARRS):
2018 July 17.98 UT: m1=7.3, Dia.=5', DC=6/ ... 10x50B ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ After new outburst. Morris method. In 25x100B : m1=7.4, Dia.=5', DC=6. In 20 cm SCT (77x) : m1=7.9, Dia.=4.5', DC=5/, Faint ion tail: 0.6 deg. in PA 300 deg, Sidgwick method. Tycho-2 comparison stars. SQM : 21.0.].

C/2018 N1 (NEOWISE):
2018 July 18.11 UT: m1=8.8, Dia.=12', DC=1/ ... 20 cm SCT (77x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ Mag. 11.0 (TK) star in coma. Altitude: 21 deg. Sidgwick method. Tycho-2 comparison stars. SQM : 21.0.].

21P/Giacobini-Zinner:
2018 July 18.04 UT: m1=9.9, Dia.=4', DC=4 ... 20 cm SCT (77x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ Sidgwick method. Tycho-2 comparison stars. SQM : 21.3.].

29P/Schwassmann-Wachmann:
2018 July 18.06 UT: m1=12.3, Dia.=2.5', DC=1/ ... 20 cm SCT (100x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ From dark mountain skies the comet shows a faint and very diffuse coma, remnant of previous outbursts. Field stars checked in DSS. Altitude: 38 deg. Sidgwick method. APASS comparison stars. SQM : 21.3.].

37P/Forbes:
2018 July 18.09 UT: m1=11.0, Dia.=4', DC=1/ ... 20 cm SCT (77x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ Sidgwick method. Tycho-2 comparison stars. SQM : 21.3.].

48P/Johnson:
2018 July 18.13 UT: m1=10.5, Dia.=5', DC=1/ ... 20 cm SCT (77x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ Faint outer coma. Sidgwick method. Tycho-2 comparison stars. SQM : 20.8.].

66P/du Toit:
2018 July 18.12 UT: m1=9.9, Dia.=4', DC=2 ... 20 cm SCT (77x) ... Juan Jose Gonzalez ( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W ) [ Beginning of astronomical twilight. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM : 21.0.].


( Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W;
  SQM 21.6 at zenith.).

請問用The sky-x 要去那裡抓這顆彗星的軌道？

fb聯盟有人提過，一般有位置可download

甘醫生

https://www.facebook.com/photo.php?fbid=1761078737346424&set=a.103821636405484.4761.100003329437162&type=3&theater

(https://scontent.ftpe8-1.fna.fbcdn.net/v/t1.0-9/37609480_1761078740679757_2530733733124767744_n.jpg?_nc_cat=0&oh=3b8aa8fe91dcc06eaab206f6d51a9374&oe=5BD44949)

(https://scontent.ftpe8-1.fna.fbcdn.net/v/t1.0-9/37603491_1761121140675517_5104382229715353600_n.jpg?_nc_cat=0&oh=798bfbe7636e933a882995693eadc999&oe=5BE29B4B)

https://groups.yahoo.com/neo/groups/comets-ml/conversations/messages/27172

Hello all,

Not only is comet C/2017 S3 (PANSTARRS) fading (last night, the central condensation was about 1.5 magnitudes fainter than three nights ago), but the orbit apparently changed as well. My orbit calculations (using Find_Orb) are based on the data published by the MPC (last observation was May 21) and my own observations in the last two months. It was quite easy to find an orbit for all data up to July 20 (mean residual of 0.46“). However, that orbit turned out to be inconsistent with my astrometric results obtained since July 21. The problem is document in the table provided below.

My G40 observations from last night (July 23) can be made consistent with the observations until July 20 by subtracting 52 seconds from the true observation time. In other words, the comet appears to be delayed by 52 seconds now. For my H06 observations on July 21 the delay is about 30 seconds. The apparent delay could be a sign of disintegration.

Kind regards

Bernd Lütkenhöner


Table: My observations of the last 10 days. The residuals (in arcsecs) are given in the last two columns.

18 07 14.20524    G40 04 21 33.26   +57 36 15.1     .62-  .45+
18 07 14.21234    G40 04 21 36.34   +57 36 06.8     .41-  .01-
18 07 14.21538    G40 04 21 37.70   +57 36 03.5     .01+  .06+
18 07 16.19733    G40 04 36 15.65   +56 53 26.9     .36+  .39-
18 07 16.20594    G40 04 36 19.56   +56 53 15.0     .40+  .09-
18 07 16.20943    G40 04 36 21.15   +56 53 10.0     .46+  .14-
18 07 17.19361    G40 04 43 54.20   +56 27 53.4     .47+  .13+
18 07 17.20059    G40 04 43 57.43   +56 27 41.9     .32+  .22-
18 07 17.20405    G40 04 43 58.99   +56 27 36.8     .10-  .21+
18 07 18.20407    G40 04 51 51.01   +55 58 44.2     .05-  .13-
18 07 18.21806    G40 04 51 57.71   +55 58 19.2     .20+  .06+
18 07 20.44847    H06 05 10 12.39   +54 40 37.5     .05+  .02-
18 07 20.45396    H06 05 10 15.14   +54 40 24.9     .04-  .15+
18 07 21.44265  X H06 05 18 38.26   +53 59 18.0     1.6-  .86+
18 07 21.45007  X H06 05 18 42.09   +53 58 59.1     1.5-  1.2+
18 07 22.20753  X G40 05 25 14.86   +53 24 20.6     2.7-  2.2+
18 07 22.21098  X G40 05 25 16.62   +53 24 10.6     3.0-  2.0+
18 07 22.21444  X G40 05 25 18.47   +53 24 00.9     2.6-  2.0+
18 07 23.20189  X G40 05 33 59.72   +52 34 19.8     3.2-  2.4+
18 07 23.20859  X G40 05 34 03.28   +52 33 58.4     3.3-  2.0+
18 07 23.21207  X G40 05 34 05.25   +52 33 47.5     2.3-  2.1+
18 07 23.21902  X G40 05 34 08.91   +52 33 26.0     2.6-  2.4+
18 07 23.22244  X G40 05 34 10.76   +52 33 14.7     2.4-  1.9+

https://www.skyandtelescope.com/observing/bright-comet-prospects-for-2018/

(https://www.skyandtelescope.com/wp-content/uploads/2018-S3-Panstarrs_V2.jpg)

https://www.astronomie.be/erik.bryssinck/c2017s3_20180724.html

https://toptechnewz.com/catch-comet-c-2017-s3-panstarrs-in-outburst/

還是沒很亮阿...


https://www.universetoday.com/139573/catch-comet-c-2017-s3-panstarrs-in-outburst/

https://www.calsky.com/cs.cgi/Comets/3?

http://spaceweathergallery.com/indiv_upload.php?upload_id=146849&PHPSESSID=6kaetj3qmf7p8c9t54ihibfga4

https://www.cnbeta.com/articles/science/755087.htm

这个天体最近经历了两次明亮的爆发，一次是在六月底，另一次是在七月底。

正是第二次爆发导致这颗彗星周围出现大量气体云，使其发出绿光  彗星周围的气体直径达161,000英里，当天体飞向太阳时，光芒本身就是电离的结果。据悉，在到达地球的最近距离点时，PanSTARRS C/2017 S3将距离地球约7000万英里，这意味着它不构成威胁。

NASA JPL近地物体研究中心经理Paul Chodas在接受《Live Science》采访时称，虽然这颗彗星目前还不可见，因为它过于靠近太阳.但是本月晚些时候，当它移动得更远时，世界某些地方的人们可能会看到这颗彗星