The motions of Phobos and Deimos from Mariner 9 TV data

Born, George H.; Duxbury, T.

doi:10.1007/bf01228626

Cited by 31 publications

(3 citation statements)

References 12 publications

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“…This period of expansion lasted throughout the Voyager years, 1973Voyager years, -1989. While photographic techniques predominated (Pascu 1977(Pascu , 1979, this period saw the introduction of several new observational methods -in particular, mutual phenomena techniques (Millis 1974;Aksnes and Franklin 1975), space techniques (Born and Duxbury 1975;Callahan 1988, 1989), and CCD techniques (Pascu et al 1983(Pascu et al , 1987.…”

Section: Recent Historymentioning

confidence: 99%

Long-focus CCD astrometry of planetary satellites

Pascu¹

1996

Symp. - Int. Astron. Union

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CCD detectors are rapidly replacing the photographic plate and photomultiplier in satellite observations used for orbital improvement. This includes both phenomena timings as well as tangent plane astrometry. In most cases this change has been for the better, but in some areas there has been no gain – even a loss. We will review this change in terms of the recent history of satellite observations. The impact of the CCD will be discussed in terms of its applications, and the increase in precision it affords. Finally, a few things will be said about future directions, especially about spin-off applications.

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Section: Recent Historymentioning

confidence: 99%

Long-focus CCD astrometry of planetary satellites

Pascu¹

1996

Symp. - Int. Astron. Union

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“…<< 1 and using(1,7) find (up to the small A, B ) the difference between the values of satellite's real orbital velocity V ′ S estimated in Σ ′ , and observed velocity V S (t) estimated in Σ…”

mentioning

confidence: 93%

“…In 2003 Beagle-2 (UK) shared the destiny without any firm conclusion of the loss. Survivors showed deficiency of existing theories: Mariner 9 (NASA, 1971) [7,8] and Mars Express (ESA, 2004) [9] found Phobos in kilometers ahead of its expected position. A new space mission Phobos-Grunt (Russia) is planned soon [10]; if its computer program determines the target position using old models, the project may have problems.…”

Section: Introduction: Phobos' Irregular Motion Theory and Practicementioning

confidence: 99%

Relativistic Warning to Space Missions Aimed to Reach Phobos

Yefremov¹

2011

IJAA

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Disagreement in estimations of the observed acceleration of Phobos yields several theories empirically modifying classical description of motion of the satellite, but its orbital positions detected by Mars-aimed spacecraft differ from predictions. It is shown that the satellite’s orbital perturbations can be explained as manifestations of the relativistic time-delay effect ignored in classical models. So computed limits of Phobos’ acceleration essentially exceed the experimental values. The satellite’s expected orbital shift is calculated for the moment of contact with a landing module of the Phobos-Grunt project; the shift assessed in kilometers may prevent the mission success. Limits of the apparent relativistic accelerations are predicted for fast satellites of Jupiter

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3.2.1.3 Satellites and ring systems of the planets

Gondolatsch¹

Landolt-Börnstein - Group VI Astronomy and Astrophysics

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The motions of Phobos and Deimos from Mariner 9 TV data

Cited by 31 publications

References 12 publications

Long-focus CCD astrometry of planetary satellites

Long-focus CCD astrometry of planetary satellites

Relativistic Warning to Space Missions Aimed to Reach Phobos

3.2.1.3 Satellites and ring systems of the planets

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