Re: Possibility of observing CRS-11 from Europe shortly after launch

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 24 May 2017 16:42:38 +0200
Op 24-5-2017 om 12:44 schreef Ramon van der Hilst via Seesat-l:
> Hi all,
> 
> a user in the SpaceX sub-reddit made calculations suggesting that those in
> Western Europe will be able to see the second stage + Dragon spacecraft
> shortly after launch, for the upcoming launch currently planned NET June 1.
> ISS is going to reach highest latitude over Europe, CRS-11 would be ~100km
> lower.
> 
> See here:
> https://www.reddit.com/r/spacex/comments/6cyjjo/heads_up_on_possible_rare_visible_pass_of_crs11/
> 
> I don't have the skills/tools to check his calculations, but it may be to
> interest to some of you.
> 
> Best regards,
> Ramon van der Hilst


Hi Ramon,

Here is a proxy elset for Dragon CRS-11 based on CRS-10, assuming launch at 1
June 2017, 21:55:00 UT:

DRAGON CRS-11
1 72000U 17000A   17152.92807335 0.00000000  00000-0  00000+0 0    02
2 72000  51.6320 114.8208 0115859  44.2692  54.5468 15.98180622    02

This would result in a visible pass over western Europe about 20 minutes after
launch. Shadow entry is near 22:17:30 UT, for my location in Leiden at 35
degrees elevation in the S-SW.

Apart from DRAGON, the Falcon 9 booster (very close to it) and two solar panel
covers will be visible, the latter variable in brightness.

For the first revolution, if launch happens after 21:55:00 UT just ad the time
difference to get approximate pass times.

Here is my 2015 imagery from the Dragon CRS-6 launch, showing all mentioned objects:

https://sattrackcam.blogspot.nl/2015/04/spacex-dragon-crs-6-and-debris-pieces.html

- Marco


-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

Cospar 4353 (Leiden):     52.15412 N, 4.49081 E (WGS84), +0 m ASL
Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
Station (b)log: http://sattrackcam.blogspot.com
Twitter: _at_Marco_Langbroek
-----

- Marco



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Received on Wed May 24 2017 - 09:43:15 UTC

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