Re: USA 276 approaching ISS again

From: Edward Zigoy via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 13 Jul 2017 03:25:20 -0700
Correction:  7 deg 30” FOV

-----Original Message----- 
From: Edward Zigoy
Sent: Thursday, 13 July, 2017 03:09
To: marco_at_langbroek.org ; satelliet lijst (SeeSat)
Subject: Re: USA 276 approaching ISS again

(7/13/2017 09:51:20 47.6)
Got up at 0930z (0230LT)on the West Coast USA;  ISS/USA 276  out of the
shadow at 0953z 13 Jul 2017, pair were seen in flight formation just inside
the 7’ 30” FOV.

-----Original Message----- 
From: Marco Langbroek via Seesat-l
Sent: Wednesday, 12 July, 2017 09:16
To: satelliet lijst (SeeSat)
Cc: Ted Molczan
Subject: USA 276 approaching ISS again


Hi all,

Tomorrow afternoon, USA 276 will again make a series of close approaches to
the
ISS, perhaps to as close as 24 km.

The following predictions are based on this elset:

USA 276
1 42689U 17022A   17190.03474342 0.00004845  00000-0  65965-4 0    05
2 42689  50.0454 286.7139 0019557 288.5093  71.3751 15.56610866    05

..which I constructed from Alberto Rango's recent observations.

Close approaches to within 500 km:

DATE            UT              KM
7/13/2017 00:35:52 476.7
7/13/2017 01:24:02 480.8
7/13/2017 02:08:26 405.2
7/13/2017 02:56:18 409.8
7/13/2017 03:41:01 333.7
7/13/2017 04:28:35 338.8
7/13/2017 05:13:36 262.2
7/13/2017 06:00:53 267.8
7/13/2017 06:46:10 190.6
7/13/2017 07:33:11 196.8
7/13/2017 08:18:45 119.1
7/13/2017 09:05:30 126.1
7/13/2017 09:51:20 47.6
7/13/2017 10:37:49 56.2
7/13/2017 11:23:55 24.1
7/13/2017 12:10:08 23.7
7/13/2017 12:56:30 95.6
7/13/2017 13:42:28 90.0
7/13/2017 14:29:05 167.2
7/13/2017 15:14:49 160.5
7/13/2017 16:01:40 238.7
7/13/2017 16:47:09 231.5
7/13/2017 17:34:15 310.3
7/13/2017 18:19:31 302.6
7/13/2017 19:06:50 381.9
7/13/2017 19:51:52 373.7
7/13/2017 20:39:25 453.5
7/13/2017 21:24:14 444.9

There is some leeway in both time and approach distance, which can have an
error
up to a factor 2.

European observers might be able to spot ISS and USA 276 simultaniously in
the
sky in the early morning of the coming night 12-13 July.

- 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
-----
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Received on Thu Jul 13 2017 - 05:26:00 UTC

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