Updated NOSS 3-8 (NROL-79) elements

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 13 Mar 2017 16:42:57 +0100
The updated elements below are based on observations by Paul Camilleri, Leo
Barhorst and Marco Langbroek:


NOSS 3-8 (A)                                           1013 x 1200 km
1 42058U 17011A   17072.12528356 0.00000000  00000-0  00000+0 0    00
2 42058  63.4406 121.9454 0124900 178.9729 181.1576 13.40776940    09

rms 0.01            from 20 observations March 11.40 - March 13.15 UT


NOSS 3-8 (B)                                           1012 x 1201 km
1 42065U 17011B   17072.12507863 0.00000000  00000-0  00000+0 0    08
2 42065  63.4474 121.7996 0125855 179.7192 180.3925 13.40738199    07

rms 0.01               from 18 0bservations March 11.40 - March 13.15


The separation between the two objects is still decreasing, and was 120 km at
epoch time of the elsets above, but as Leo remarked, the approach appears to be
slowing down.

In the table below, "DaL" means "Days after Launch" (launch was on March 1.74).
"sep" is the separation of the two objects, in km.

DaL             sep (km)
1.387		42.70
5.417		171.37
6.457		190.44
7.280		201.97
8.623		172.28
9.592		148.89
11.382		120.23

If this trend continues, the final ~45 km separation distance will be reached
~20 days after launch (~March 22), a similar timespan as for NOSS 3-7 but with
much smaller drift distances per day. NOSS 3-7 in 2015 drifted to a maximum
separation distance of ~575 km on the 14th-15th day after launch, while NOSS 3-8
maxed at ~202 km only, on the 7th day after launch.

Later this week I will post some diagrams on my blog, comparing NOSS 3-8 to NOSS
3-7.

- 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 Mon Mar 13 2017 - 10:43:33 UTC

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