Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Jupiter and Saturn close pass - mark your calendars

  • Please log in to reply
10 replies to this topic

#1 DaveB

DaveB

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1,506
  • Joined: 21 Nov 2007
  • Loc: Maryland

Posted 18 September 2020 - 09:01 PM

On Dec 21, Jupiter and Saturn will pass within about 6 arcmin of each other, fitting them within the same eyepiece FOV for medium eyepieces. Unfortunately, they will be very low on the horizon and only visible for a short time after dusk. But I have to think that we won't be seeing something like this again in our lifetimes.

 

Here is an image from my planetarium program showing the positions of the planets and their brighter moons.

 

JupSat.png

 

Dave


  • Illinois, dan777, HellsKitchen and 7 others like this

#2 kjkrum

kjkrum

    Vostok 1

  • *****
  • Posts: 168
  • Joined: 08 Mar 2019
  • Loc: Tucson, Arizona, USA

Posted 21 September 2020 - 10:30 PM

Trying not to get too excited. I expect clouds...

#3 Illinois

Illinois

    Gemini

  • *****
  • Posts: 3,180
  • Joined: 18 Dec 2006
  • Loc: Dixon, IL. Bortle 2 land in Wis.

Posted 22 September 2020 - 06:58 AM

Pray for clear night! 



#4 TimothyPleiades

TimothyPleiades

    Explorer 1

  • -----
  • Posts: 60
  • Joined: 05 May 2020
  • Loc: Tampa, FL

Posted 22 September 2020 - 07:13 AM

They should be within 1 degree of each other for just over 2 weeks.

 

https://in-the-sky.o...&obj2txt=Saturn

 



#5 BarrySimon615

BarrySimon615

    Pa Bear

  • *****
  • Posts: 4,499
  • Joined: 01 Mar 2004
  • Loc: New Orleans, LA

Posted 22 September 2020 - 04:27 PM

How much magnification (on a steady telescope) would most say it takes to clearly say "I see Saturn's rings"?   Personally I would say it should take about 35x give or take.  At above 50x it should be easily obvious given a good night and good eyepiece/scope combination.

 

With my TMB SS 130 (910 mm focal length), I get 35x with a 26 mm Nagler.  That magnification will give me  a 2.34 degree field of view, so I should be able to get both Saturn and Jupiter into the same eyepiece field of view by about December 2nd or 3rd with Saturn's rings visible.  A 22 Nagler will give me 41x and  a 2 degree field so by  the 8th I should be able to see both together.  A 12 Nagler Type 4 will give me 76x so both in the same field by 12/11 or 12/12 when S & J are within a degree of each other.  A 12 mm ES 92 will give a more comfortable view with a bit of border around both planets.

 

The show is not really good yet as the angular spacing continues to improve so if I look at the S & J giants during a 3 day period centered on 12/21 I can use my I-Optron 150 mm f/12 Mak with it's 1800 mm of focal length.  With the premium 12 mm eyepieces I get 150x in this scope  and both eyepieces yield a field of better than a half degree, so both planets have plenty of room to swim is such a relatively broad expanse of sky.  Shoot, even a 7 mm Nagler will give me 257x and a field diameter of 18.6 arc minutes so in and close to 12/21, both planets make it easily in the same high power view.  Social distancing and all, do you think they should be wearing masks?shocked.gif

 

Barry Simon

Attached Thumbnails

  • Jupiter_and_Saturn_12-21-20_with_a_7_mm_82_degree_field - No background (1).png

Edited by BarrySimon615, 23 September 2020 - 12:15 PM.

  • shkeller55 likes this

#6 Bill Barlow

Bill Barlow

    Aurora

  • *****
  • Posts: 4,737
  • Joined: 03 Dec 2007
  • Loc: Overland Park KS

Posted 24 September 2020 - 11:12 AM

I hope to see this conjunction since both planets will be close together for about a week.  But clouds and possible rain or snow may interfere some of the evenings.

 

Bill



#7 RockyMtnRR

RockyMtnRR

    Explorer 1

  • -----
  • Posts: 63
  • Joined: 23 Apr 2020
  • Loc: SLC, UT

Posted 25 September 2020 - 02:28 PM

I can't lose!  It's either clear skies for planetary close pass or snowing like a bugger for skiing.  :D   Calendar is marked!


  • shkeller55 likes this

#8 REC

REC

    Voyager 1

  • *****
  • Posts: 11,925
  • Joined: 20 Oct 2010
  • Loc: NC

Posted 28 September 2020 - 01:31 PM

On Dec 21, Jupiter and Saturn will pass within about 6 arcmin of each other, fitting them within the same eyepiece FOV for medium eyepieces. Unfortunately, they will be very low on the horizon and only visible for a short time after dusk. But I have to think that we won't be seeing something like this again in our lifetimes.

 

Here is an image from my planetarium program showing the positions of the planets and their brighter moons.

 

attachicon.gifJupSat.png

 

Dave

Very cool sight with all the moons in the FOV!



#9 chrysalis

chrysalis

    ISS

  • *****
  • Posts: 23,779
  • Joined: 10 Aug 2013
  • Loc: North Central NC

Posted 29 September 2020 - 04:30 AM

A preliminary feature on 12-17: the Moon looks to pass about a degree south of the pair on 12-17-20.



#10 chrysalis

chrysalis

    ISS

  • *****
  • Posts: 23,779
  • Joined: 10 Aug 2013
  • Loc: North Central NC

Posted 29 September 2020 - 04:33 AM

From CdC (click for bigger pic):

 

Jupiter-Saturn 12-21-20.JPG


Edited by chrysalis, 29 September 2020 - 04:33 AM.


#11 HellsKitchen

HellsKitchen

    Vanguard

  • -----
  • Posts: 2,043
  • Joined: 05 Sep 2008
  • Loc: Renmark, Australia

Posted 08 October 2020 - 08:25 AM

This is going to be the closest conjunction between them in 400 years, and it won't be matched until 2080. This must be acknowledged. 

 

Swear to god if it's cloudy on Dec 21 I swear to god....




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics