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K5ARH > SAREX 18.09.96 05:30l 107 Lines 4354 Bytes #-10801 (0) @ AMSAT
BID : STS-79.007
Read: GUEST OE7FMI
Subj: STS-79 SAREX Update Number 7
Path: DB0AAB<DB0KCP<OE9XPI<HB9EAS<F6KDL<DB0HOM<DB0PSC<DB0GH<LX0PAC<ON7RC<
ON1BWP<ON6AR<F6CNB<KD4IDR<WB0TAX<K5ARH
Sent: 960917/2325z @:K5ARH.#LFT.LA.USA.NOAM #:66621 $:sts-79.007
Silver Spring, Maryland USA
September 17, 1996 @ 2100 UTC
ATLANTIS ORBITAL SCHEDULE
Racing around the world in preparation for the scheduled linkup,
STS-79 Commander Bill Readdy and Pilot Terry Wilcutt conducted a
rendezvous burn at 0052 UTC today to refine Atlantis' approach to
the orbiting space complex. Atlantis is currently closing in on
Mir at a rate of 500 nautical miles every orbit.
Here are the current keplerian elements for Atlantis (and Mir, see
below) as provided by Gil Carman WA5NOM at the NASA Johnson Space
Center. The element set #907 for Atlantis is valid until the NC-4
burn on September 18 at 0046 UTC which will increase apogee and
perigee altitudes by about 2 n.mi.
STS-79
1 24324U 96057A 96261.67776106 .00058614 00000-0 11307-3 0 9074
2 24324 51.6509 18.3488 0037895 342.8253 17.1640 16.00511194 225
Satellite: STS-79
Catalog number: 24324
Epoch time: 96261.67776106 = yrday.fracday
Element set: 907
Inclination: 51.6509 deg
RA of node: 18.3488 deg
Eccentricity: .0037895
Arg of perigee: 342.8253 deg
Mean anomaly: 17.1640 deg
Mean motion: 16.00511194 rev/day
Decay rate: 5.86140E-04 rev/day^2
Epoch rev: 22
Checksum: 311
The next burn, NC-5, follows at 11:39 UTC, which will increase apogee
by an additional 40 n.mi. The following two-line element set #909 is
based on the current predicted orbit after completion of the NC-4
and NC-5 burns.
STS-79
1 24324U 96057A 96262.48964145 .00049835 00000-0 85830-4 0 9096
2 24324 51.6541 14.0129 0092642 336.0560 23.6314 15.85643808 357
The orbit of Mir remains much more stable:
Mir
1 16609U 86017A 96261.39480309 .00002806 00000-0 37580-4 0 6691
2 16609 51.6523 19.4478 0009736 179.6485 180.4557 15.61936602604373
Satellite: Mir
Catalog number: 16609
Epoch time: 96261.39480309 = (17-Sep-96 09:28:30.98 UTC)
Element set: 669
Inclination: 51.6523 deg
RA of node: 19.4478 deg Semi-major axis: 3650.1932 n.mi.
Eccentricity: .0009736 Apogee altitude: 209.8129 n.mi.
Arg of perigee: 179.6485 deg Perigee altitude: 202.7053 n.mi.
Mean anomaly: 180.4557 deg Altitude decay: 0.0044 n.mi./day
Mean motion: 15.61936602 rev/day Apsidal rotation: 3.7529 deg/day
Decay rate: 2.806e-05 rev/day^2 Nodal regression: -5.0362 deg/day
Epoch rev: 60437 Nodal period: 92.1318 min
Checksum: 336
For one's planning purposes courtesy of Gil Carman, here is the
orbital adjustment schedule for Atlantis covering the entire
mission as developed prior to launch. This data will provide some
additional insight to the various Atlantis trim burns which will
make it necessary for new on-orbit element sets to be generated.
Actual time of launch was September 16 (Day 260) at 08:54:49 UTC.
STS-79 Prelaunch elements based on a launch of 16-Sep-96 08:53:49 UTC:
JSC-001 - 16-Sep-96 09:36:42 UTC to 16-Sep-96 12:34:46 UTC - OMS-2
JSC-002 - 16-Sep-96 12:34:46 UTC to 17-Sep-96 06:07:40 UTC - NC-1
JSC-003 - 17-Sep-96 06:07:40 UTC to 17-Sep-96 11:03:19 UTC - NPC
JSC-004 - 17-Sep-96 11:03:19 UTC to 18-Sep-96 00:33:07 UTC - NC-3
JSC-005 - 18-Sep-96 00:33:07 UTC to 18-Sep-96 11:35:43 UTC - NC-4
JSC-006 - 18-Sep-96 11:35:43 UTC to 18-Sep-96 23:00:49 UTC - NC-5
JSC-007 - 18-Sep-96 23:00:49 UTC to 19-Sep-96 00:32:53 UTC - NC-6
JSC-008 - 19-Sep-96 00:32:53 UTC to 19-Sep-96 01:55:00 UTC - TI
JSC-009 - 19-Sep-96 01:55:00 UTC to 19-Sep-96 03:16:49 UTC - INTERCEPT
JSC-010 - 19-Sep-96 03:16:49 UTC to 24-Sep-96 03:15:48 UTC - DOCKING
JSC-011 - 24-Sep-96 03:15:48 UTC to 25-Sep-96 07:53:49 UTC - SEP BURN
JSC-012 - 25-Sep-96 07:53:49 UTC to 25-Sep-96 12:13:00 UTC REBOOST DTO
Deorbit: 25-Sep-96 12:13 UTC (orbit 144)
Landing: 25-Sep-96 13:13 UTC (orbit 145)
Obviously, Mir rendezvous orbits for the space shuttle are very
dynamic. Watch for further SAREX bulletins as the mission develops.
[Amateurs are encouraged to relay these SAREX messages to their
local packet BBS as long as the Bulletin IDentification (BID) is
preserved. The BID is the character string starting with the dollar
sign ($), for example as in "SB SAREX @ AMSAT $STS-79.007" without
the quotation marks.]
Submitted by Pat Kilroy, WD8LAQ for Frank H. Bauer, KA3HDO and the
SAREX Working Group.
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