| 1. |
- Blomberg, Lars
(författare)
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Mercury's magnetosphere, exosphere and surface : Low-frequency field and wave measurements as a diagnostic tool
- 1997
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Ingår i: Planetary and Space Science. - 0032-0633 .- 1873-5088. ; 45:1, s. 143-148
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Tidskriftsartikel (refereegranskat)abstract
- Diagnostics that can be made with combined electric and magnetic field measurements at Mercury are reviewed. Fundamental electrodynamic questions which can be answered by means of a Mercury Orbiter are discussed. These include, solar wind-magnetosphere coupling, coupling to low altitude, exospheric or planetary surface conductivity, auroral particle acceleration, and magnetospheric substorms. It is concluded that a comprehensive instrumentation package for low-frequency fields and waves on a future Mercury Orbiter mission may yield significant new information of interest to magnetospheric as well as to planetary physics in general. (C) 1997 Elsevier Science Ltd.
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| 2. |
- Belskaya, IN, et al.
(författare)
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Physical properties of M class asteroids
- 1996
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 44:8, s. 783-794
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Tidskriftsartikel (refereegranskat)abstract
- The available data on M class asteroids have been collected and analysed. The possible number of M-asteroids in the main asteroid belt larger than 30 km was estimated to be about 90 objects. A list of the 60 asteroids currently classified as M is presente
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| 3. |
- Denchev, P, et al.
(författare)
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Lightcurves of nine asteroids, with pole and sense of rotation of 42 Isis
- 1998
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 46:6-7, s. 673-682
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The results of photometric observations of 9 asteroids collected from 1991 to 1997 are presented. The observations have been conducted at Belogradchik and Rozhen observatories, Bulgaria. For 42 Isis a spin pole determination has been performed: we derive
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| 4. |
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| 5. |
- JORDA, L, et al.
(författare)
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COMET P/WIRTANEN, SUMMARY OF OBSERVATIONAL DATA
- 1995
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 43:3-4, s. 575-579
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- P/Wirtanen is now the main target of the Rosetta mission. The orbit of this Jupiter family comet is perturbed by frequent approaches to Jupiter. The last one occurred in 1984, and placed the comet on an orbit with reduced perihelion distance. Since no obs
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| 6. |
- Mottola, S, et al.
(författare)
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The slow rotation of 253 Mathilde
- 1995
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 43:12, s. 1609-1613
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Tidskriftsartikel (refereegranskat)abstract
- CCD photometry of the NEAR mission fly-by target 253 Mathilde is presented. Measurements taken during 52 nights of observations, from February to June 1995, allow a rotation period of 17.406 +/- 0.010 days and a lightcurve amplitude of 0.45 +/- 0.02 mag t
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| 7. |
- Shevchenko, VG, et al.
(författare)
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Asteroid observations at low phase angles. I. 50 Virginia, 91 Aegina and 102 Miriam
- 1997
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 45:12, s. 1615-1623
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- We present observations of magnitude-phase dependences of three low-albedo asteroids down to phase angles of 0.1-0.2 degrees. Data were obtained during 40 nights from 1994 to 1995 within the joint observational program at ESO and Kharkiv Astronomical Obse
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| 8. |
- Skoglov, Erik
(författare)
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Evolution of the obliquities for nine near-Earth asteroids
- 1997
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 45:4, s. 439-447
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Tidskriftsartikel (refereegranskat)abstract
- The evolution of the obliquities of nine near-Earth objects is investigated, using the method developed by Laskar and Robutel (Nature 361, 608-612, 1993). A comparison with a frequency analysis is also made. The evolutions of the orbital elements are irre
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| 9. |
- Skoglov, Erik, et al.
(författare)
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Evolution of the obliquities for ten asteroids
- 1996
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 44:10, s. 1177-1183
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Tidskriftsartikel (refereegranskat)abstract
- Using the method developed by Laskar and Robutel (Nature 361, 608-612, 1993), the evolution of the obliquities of ten large asteroids is investigated. These are compared with a frequency analysis. Generally, the orbits of the asteroids in the sample have
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| 10. |
- Skoglov, Erik
(författare)
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Spin vector evolution for inner solar system asteroids
- 1999
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Ingår i: PLANETARY AND SPACE SCIENCE. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0032-0633. ; 47:1-2, s. 11-22
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Tidskriftsartikel (refereegranskat)abstract
- The spin vector evolution of 30 asteroids in the inner solar system is investigated using 10 different orbital integrations for each object, since the orbital evolutions are chaotic for all the objects examined. Close encounters with major planets and res
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