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Topic: Mars-crosser asteroid

    Note: these results are not from the primary (high quality) database.

Asteroid. Who is Asteroid? What is Asteroid? Where is Asteroid? Definition of Asteroid. Meaning of Asteroid. The only Mars Trojan s detected have been based on one-time apparitions, which are not as reliable as asteroids with confirmed orbits. Asteroids are commonly classified into groups based on the characteristics of their orbits and on the details of the spectrum of sunlight they reflect. Asteroids are classified into spectral types by their optical spectrum, which corresponds to the composition of the asteroid's surface material. www.knowledgerush.com /kr/encyclopedia/Asteroid

asteroid The distribution of the various classes throughout the asteroid belt is highly structured, suggesting that many asteroids formed at or near their present distances from the Sun and are representative of the composition of the solar nebula (not including hydrogen and helium) at these locations. Some asteroids, such as Ceres, Pallas, and Vesta, are nearly spherical; others, like (15) Eunomia (see Eunomia family), (107) Camilla, and (511) Davida, are quite elongated; still others, such as (4769) Castalia, (216) Kleopatra, and (4179) Toutatis, have bizarre shapes. Several asteroids, including (243) Ida, (45) Eugenia, and (762) Pulcova, are known to have small moons of their own. www.daviddarling.info /encyclopedia/A/asteroid.html

BBC - Stardate - Asteroids: Keeping Track For example, asteroid 525 Adelaide (discovered in 1904 by the German astronomer Max Wolf, Heidelberg) and asteroid 1171 (Rusthawelia, discovered by S. Arend, in October 1930, from Uccle, Belgium) turned out, in 1958, after the orbit of Rusthawelia had been well established, to be one and the same object. This is because an asteroid has to have a mass of at least 1000 tons (around 10 m across) if it is to have a chance of producing a crater and there are now far fewer asteroids large enough left in the solar system. Asteroids discovered between January 1 and January 15 were labelled A, January 16 and 31 B, and so on. www.open2.net /astronomy/asteroids/tracking.html

Crosser Mars-crosser asteroid A Mars-crosser asteroid is an Trojan, and (26677) 2001 EJ (For a complete listing, see: List of as... Neptune-crosser asteroid A Neptune-crosser asteroid is an Neptune. Earth-crosser asteroid An Earth-crosser asteroid is a Apollo asteroids. www.brainyencyclopedia.com /topics/crosser.html

Mars-crosser Mars-crossers are believed to have originated as main-belt asteroids that fell into a 3:1 orbital resonance (at a heliocentric distance of 2.5 AU) with Jupiter. Over a period of about 100,000 years, as perturbations accumulate, the asteroid becomes a Mars-crosser. An asteroid whose perihelion lies within part or all of the orbit of Mars. www.daviddarling.info /encyclopedia/M/Mars-crosser.html

Asteroids, asteroid free, giant asteroid Asteroids are rocky and metallic objects that orbit the Sun but are too small to be... Asteroids are small bodies that are believed to be left over from the... Asteroids are placed into groups according to the type of orbit which they... watchcomputer.com /asteroids.html

A Close Encounter with a Space Rock Once an asteroid is in the 3:1 resonance region (at a heliocentric distance of 2.5 AU), it can evolve to a Mars crosser in about 100,000 years and then Mars' perturbations can evolve the asteroid to an Earth crosser in several tens of million years." Orbital elements for the asteroid and an observing ephemeris are available from the Minor Planet Center. The asteroid is not now a threat to Earth, but astronomers plan to continue monitoring the fast-moving space rock to learn more about future encounters. spacescience.com /headlines/y2000/ast01sep_1.htm?list

(meteorobs) Excerpts from "CCNet, 36/2000 - 21 March 2000" PLANETARY AND=20 SPACE SCIENCE, 2000, Vol.48, No.1, pp.59-65 *) ACADEMY OF SCIENCE OF THE CZECH REPUBLIC,INST ASTRON,CZ-25165=20 ONDREJOV,CZECH REPUBLIC We present results of our photometric observations of the Apollo=20 asteroid (4197) 1982 TA and the Mars-crosser 1997 LY4. The smaller (1.4-3 km), slowly-rotating=20 asteroid 1997 LY4 is an elongated object with the equatorial axis ratio = greater than or equal to 1.8. The mean diameter of=20 (4197) is likely in the range 3-6 km, The present knowledge does not=20 support a possibility that (4197) is an extinct cometary nucleus as=20 suggested from its orbit. www.meteorobs.org /maillist/msg18075.html

Mars-crosser asteroid - Iridis Encyclopedia fr:Astéroïde aréocroiseur A Mars-crosser asteroid is an asteroid whose orbit crosses that of Mars. Buried in the list are two peculiar asteroids: 5261 Eureka, the only numbered Martian Trojan, and (26677) 2001 EJ, Mars' only other numbered co-orbital. www.iridis.com /Mars-crosser_asteroid

Bibliographie des DLR (LIDO) Image data from the DS1 encounter with Asteroid 9969 Braille and data from a coordinated ground-based photometric observing campaign are combined to study the physical properties of this small Mars crosser. Using telescope and flyby data in combination, the asteroid is estimated to have a size of 2.1×1×1 km3 and shown to have photometric properties similar to the asteroid 4 Vesta, notably a comparably high albedo. A Model for Rotation and Shape of Asteroid 9969 Braille from Ground-Based Observations and Images Obtained during the Deep Space 1 (DS1) Flyby www.dlr.de /lido/WP/2003/1960562003.html

Micah Reese In both cases, traces on the asteroid and Mars were used to help determine when the asteroid became a Mars-crosser. Since the orbit of the asteroid is mostly changed by a close pass with Earth, the probability of becoming a Mars-crosser increases with the probability of passing close to Earth. From the trials I performed, the fastest evolution was the least elliptical of the orbits that evolved into Mars-crossers. carnap.umd.edu /phil250/st_papersS98/Reese_3.html

Dynamical sources and evolutions of different populations of Earth-crossers These sources are main belt bodies injected into the main resonances of the asteroid belt, and Mars-crosser asteroids, which are themselves transported from the main belt to Mars-crossing orbits through high order resonances. Considering a scenario in which the Earth-crosser population is maintained in a steady-state (as suggested by the number and ages of lunar craters), we will present different results on the orbital distribution of the Earth-crosser populations coming from each source, and their dynamical evolutions. In particular, we will show how some objects can be transported in regions in which no asteroid has been discovered yet (e.g. www.astro.univie.ac.at /~dvorak/activities/html/mic.html

(29075) 1950 DA - Art History Online Reference and Guide However, for a few days in December 2004 it was temporarily surpassed by 2004 MN This Mars-crosser asteroid was first discovered on February 23, 1950 by Carl A. Wirtanen ; it was observed for 17 days and then faded from view for half a century. Asteroid 1950 DA is an asteroid considered to be the near Earth object with the highest known probability of crashing into Earth, according to the Palermo Technical Impact Hazard Scale. Radar observations were made at the Goldstone and Arecibo Observatory from March 3 to 7, 2001 during the asteroid's 7.8 Gm approach to the Earth (a distance 21 times larger than that separating the Earth and Moon). www.arthistoryclub.com /art_history/1950_DA

[37.01] Lightcurve Studies of Asteroid 9969 (1992KD), Fly-by Target of the Deep Space 1 Spacecraft Little is known about the small Mars crosser asteroid 9969 (1992 KD), which was recently chosen as a target for the DS1 mission. However, for rotational periods of this length, we should expect the asteroid to be in an excited rotation state, owing to the long damping time required for this small object to return to principal-axis rotation (Harris, Icarus 107, 209-211, 1994). Assuming that the asteroid has a two-maxima/two-minima lightcurve, the most probable synodic rotational period is 226 +/- 3 hours (9.4 days) with a mean lightcurve magnitude R(1,a=24)=17.0 and a peak-to-peak amplitude of about 0.9 mag. www.aas.org /publications/baas/v31n4/dps99/80.htm

433 Eros - Pictures It is an S-type asteroid approximately 13 × 13 × 33 km in size, the second-largest near-Earth asteroid. It was visited by the NEAR Shoemaker probe, which first orbited it taking extensive photographs of its surface and then on February 12th 2001 at the end of its mission was landed on the asteroid's surface using only its maneuvering jets. The asteroid 433 Eros was named after the Greek god of love Eros. www.greatestinfo.org /433_Eros

[10.05] The Mars-Crosser Population and Origin of Earth-Crosser Asteroids We then have shown with numerical simulations that the asteroids of the dominant class evolve to intersect the Earth's orbit on a median time-scale of about 20 Myr and that the Mars--crosser asteroids can sustain the Earth--crossing population. Concerning asteroids larger than 5~~km, Mars--crossers are about 35 times more numerous than Earth--crossers. Recent dynamical results have pointed out that the bodies injected by collisions into the main resonances of the asteroid belt could difficultly sustain the observed population of Earth--crossers of large diameter. www.aas.org /publications/baas/v30n3/dps98/84.htm

Long-term orbital integration studies of 1998 AK8 and P/ODAS (1998 X1) A short summary of the OCA-DLR Asteroid Survey (ODAS) will be given. The past and future orbital evolution will be discussed in some detail. www.astro.univie.ac.at /~dvorak/activities/html/hah.html

Crossers List of noteworthy asteroids 54: asteroids are either Mars-crosser asteroidMars-crossers (probably in the process of being ejected from Saturn-crosser asteroid 3: zers or co-orbitals known; most if not all of the are Centaur (planetoid)Centaur... Amor asteroid 37:) are actually Jupiter-crosser asteroidJupiter Crkssers. www.buyorbust.com /start/40351-crossers.html

3 Results Among these asteroids, one Mars-crosser, 4558 Janesick, and all four NEAs have already been observed by SMASS, and both classifications agree, as can be seen in Tables 3 and 4. It must be noted, however, that the IRAS albedo for this asteroid is 0.22, a quite high value for a B-type, while in the Bus taxonomy the median albedo value for the B-class is 0.07. The adopted value of the albedo is the median value for each class, as defined by Bus ( 1999): 0.21 for A and S asteroids, 0.07 for B asteroids, 0.06 for C asteroids, 0.23 for V asteroids, and 0.10 for X asteroids. www.edpsciences.org /articles/aa/abs/2002/32/aa2578/node3.html

Brief summary of Klet photographic search programme for minor planets The majority of the Klet' photographic discoveries are main belt asteroids, but two Amor type asteroids and one Trojan have been found. the majority of these Klet' discoveries are of main-belt asteroids Further astrometric observations at further oppositions are necessary for the rest of the Klet' unnumbered discoveries. www.klet.org /names/briefsum.html

NEAT February 1998 Interesting Objects It is a Mars-crossing asteroid, about 7 km in size, with a,e,i,q = 2.29, 0.34, 20.5, 1.51 (G. Williams, SAO), discovered with NEAT on 2/22/98. It is a Mars-crossing asteroid (G. Williams, SAO) discovered with NEAT on 2/22/98. = BQLC1W is an Aten Earth-crossing asteroid discovered with NEAT on 2/27/98 and followed up on subsequent nights by D. Rabinowitz at TMO and other observers. neat.jpl.nasa.gov /98feb.html

(1036) Ganymed Ganymed is an Amor object, that is a Mars crosser. (1036) Ganymed = 1924 TD This asteroid was discovered by Walter Baade at Bergedorf in October 23rd 1924 and named after the cup bearer of the gods of Olympus. It has a highly excentric orbit with perihelion at 1.23AU and aphelion at 4.09AU. www.iac.es /galeria/mrk/comets/1036/1036.htm

What does this mean: I found some information about it that has no real meaning to me, so I was wondering if anyone could tell me this meant: "The asteroid 4179 Toutatis is an Apollo, an Alinda and a Mars-crosser asteroid with a chaotic orbit produced by a 3:1 resonance with the planet Jupiter. I'm doing a project on NEOs (Near Earth Objects) and I'm writing about the asteroid Toutatis right now. I'm doing a project on NEOs (Near > Earth Objects) and I'm writing about the > asteroid Toutatis right now. theastropages.com /discussionboards/astronomy.pl?read=842

Articles - 4179 Toutatis To put the September 29, 2004 approach in perspective, imagine the asteroid and the Earth as two race cars, on two racetracks that represent their two orbits. It is hypothesized that Toutatis formed from two originally separate bodies which coalesced at some point, with the resultant asteroid being compared to a "rubble pile". The approach on September 29, 2004 was particularly close, at 0.0104 AU (within 4 lunar distances) from Earth, presenting a good opportunity for observation. www.greensky.biz /articles/4179_Toutatis

A.L.P.O. MINOR PLANETS SECTION - MAP ALERTS FOR 2004 Its great light variability is 0.98 mag, but the half amplitude of 0.5 doesn't explain the faintness of 1.1 mag of this Hungarian asteroid. Found to be the 28 highest inclined asteroid discovered at 56.8 degrees, an Amor type. Pilcher uses to produce his yearly asteroid elongation list for the Minor Planet Bulletin, for the better of both the section, and MAP. www.lpl.arizona.edu /~rhill/alpo/minplan/alert2004.html

Bambooweb: G. f. kunz is an asteroid whose orbit crosses that of Mars (planet)Mars. www.bambooweb.com /articles/g/G._F._Kunz.html

Articles - 3753 Cruithne Jupiter has many (about 400 objects, the Trojan asteroids); there are also other small co-orbital moons in the Saturnian system: After 385 years or so, the kidney bean is now approaching Earth again from the other side, and the Earth, once more, alters the orbit of Cruithne so that its period of revolution around the Sun is again slightly less than a year. The orbits these two moons follow around Saturn are much simpler than the one Cruithne follows, but operate along the same general principles. www.kamero.net /articles/3753_Cruithne

yarko.html It is curious to note how the core of the observed Flora family is bracketed by 2.215 AU (4:7 mean motion resonances with Mars) and 2.255 AU (5:9 with Mars and 7:2 with Jupiter). Obtaining the large orbital dispersion of the Flora family and explaining several particular features of the Koronis, Maria and Eunomia families seems to indicate that our model is valid: there is a significant mobility in the asteroid belt due to the Yarkovsky force and resonances. May be that it would be worth to pick up from the asteroid database a couple of bodies in this resonance (not family members) and suggest a spectroscopic study with similar goals as Zapalla et al. www.boulder.swri.edu /~davidn/yarko/yarko.html

Articles - 9969 Braille 9969 Braille is a small Mars-crosser asteroid that was discovered on May 27, 1992 by V-type asteroid, meaning that its composition is similar to that of the much larger asteroid 4 Vesta ; possibly, Braille is a chunk of Vesta that was blown off in an impact. Most of our information about Braille comes from the Deep Space 1 spacecraft, which flew past the asteroid at a distance of 26 kilometres on July 29, 1999. www.x-moto.net /articles/9969_Braille

Asteroids with satellites The first confirmed asteroid satellite discovery was made by Galileo during its flyby of (243) Ida in 1993. History: The first observations purporting to reveal asteroid satellites were lightcurve measurements during stellar occultations by asteroids, such as those of (6) Hebe in 1977 and (532) Herculina in 1978. Many other near-Earth asteroids have high rotation rates--close to the limit where fission will occur--and a few other such objects are double-lobed, like contact binaries. www.johnstonsarchive.net /astro/asteroidmoons.html

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