Galileo Callisto 10 Flyby Entry Timeline

Callisto 10 Flyby was 17 September 1997

Galileo's third flyby of Callisto (also known as the Callisto 10 flyby because it took place during Galileo's tenth orbit around Jupiter), the second largest of Jupiter's Galilean satellites, occurred on 17 September 1997 at 00:19 UTC. At that time, Galileo will came about 538 km from the surface of Callisto (or about 1.2 Callisto radii from its center). This was the second closest encounter that Galileo had to Callisto during its prime mission and was less than 125 km farther from Callisto's surface than the second flyby which occurred on the ninth orbit in June 1997. During this orbit, observations will be made of the Jovian magnetosphere as well as of the other satellites of Jupiter. Especially noteworthy during this particular orbit will be more images of Jupiter's satellites Thebe (roughly 50 km in size), Adrastea (about 10 km), and Metis (about 20 km).

The following timeline is a list of different events which will occur beginning with the official start of the Callisto 10 (the number actually refers to the Galileo orbit number) encounter and proceding until the last data from the encounter are played back. The times are given in Universal Time (UTC) of the event at the spacecraft.

Date/Time             Instrument    Event
________              __________    _____
14 Sep  00:00                       Start of Callisto 10 encounter
        02:00                       Orbital Trim Maneuver (OTM) 32

16 Sep  14:19         RS            Callisto gravity field measurement
        17:34         NIMS          Callisto global mosaic
        20:46         PPR           Callisto darkside thermal map
        23:49         F&P           Callisto closest approach recording
        23:56         SSI           Callisto Asgard transect

17 Sep  00:10         UVS           Callisto bright limb observation
        00:19                       Callisto closest approach (2,940 km)
        00:28         NIMS          Callisto Valhalla palimpsest
        07:18         UVS           Jupiter aurora observation
        16:07         UVS           Jupiter north polar haze region observation

18 Sep  03:02         UVS           First Io observation
        07:33         SSI           Io global mosaic
        08:25         NIMS          Jupiter north pole map
        09:02         UVS           Amalthea observing
        17:57                       Ganymede closest approach (1,690,000 km)
        22:35         F&P           Jupiter magnetic equator recording
        23:10                       Jupiter closest approach (656,000 km)

19 Sep  00:04         NIMS          Adrastea/Metis observations
        04:44                       Io closest approach (320,000 km)
        05:21                       Europa closest approach (619,000 km)
        07:17         SSI           Thebe imaging
        08:23                       Science turn (high-phase Jupiter)

20 Sep  00:43         NIMS          Last Io monitoring observation
        14:30                       Start of data playback (Callisto 10)
        15:03                       Turn to return to Earth point
        21:30                       Orbital Trim Maneuver (OTM) 33

29 Sep  14:41                       Start Earth occultation by Jupiter

30 Sep  07:35                       End Earth occultation by Jupiter

05 Oct  14:03                       Start Sun occultation by Jupiter
        18:58                       Science turn (solar occultation)
        21:18         SSI           Europa volcanism observation
        21:20         SSI           Jupiter lightning/aurora observation
        23:54         SSI           Io aurora/Jupiter rings observation

06 Oct  05:20                       Turn to return to Earth point
        08:53                       End Sun occultation by Jupiter

18 Oct  16:00                       Orbital Trim Maneuver (OTM) 34

02 Nov  16:00                       End of data playback (Callisto 10)

Other Event Related News

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Dr. Edwin V. Bell, II
Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
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NASA Official: Dr. Ed Grayzeck V1.0, 06 November 1997
Last updated: 07 February 2002, EVB II