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	140 Siwa - Biocrawler (Site not responding. Last check: 2007-10-03)
		140 Siwa is a large and dark main belt asteroid.
		Siwa has a very flat lightcurve, indicating a spherical body.
		The Rosetta comet probe was to visit Siwa on its way to comet 46P/Wirtanen in July, 2008.
	www.biocrawler.com /encyclopedia/140_Siwa (197 words)

	ESA - Rosetta - Debris of the Solar System: asteroids Otawara and Siwa
		Siwa will be the largest asteroid ever encountered by a spacecraft, while (apart from a tiny asteroid moon called Dactyl) Otawara will be the smallest.
		Otawara is suspected to be a chunk of once-molten basalt (a type V or SV asteroid), and Siwa seems to be a carbon-rich object, which is fler than coal (a type C asteroid).
		At this time, Siwa will be about 470 million km from the Earth, so that signals from the spacecraft will take 26 minutes to reach ground stations.
	www.esa.int /export/SPECIALS/Rosetta/ESAFIF7708D_0.html (388 words)

	CNRSinfo - en382a2
		The first, 140 Siwa, is a very primitive asteroid.
		However, before arriving at Wirtanen, the probe will pass 4979 Otawara and 140 Siwa in order to perform physical and chemical analysis of these objects.
		140 Siwa has a diameter of about 110 km and rotates on its axis in 18.5 hours.
	www.cnrs.fr /Cnrspresse/en382a2.htm (358 words)

	[No title]
		The calculations have been extended from the 7th till the 13th of July 2006 for the Otawara flyby, and from the 18th till the 26th of July 2008 for the Siwa flyby.
		On the floor, the heaters for thermal control b) right panel: the external baffle with its attaching frame and the internal baffling structure (the front door mechanism was not mounted at this stage).
		For Siwa, the Hill sphere can be entirely imaged down to a distance of 35.000 km, and for Otawara down to 7600 km.
	www.ifa.hawaii.edu /~bernardi/PosterDPS2001.doc (2490 words)

	INTRODUCTION (Site not responding. Last check: 2007-10-03)
		On the other hand a possible opportunity to fly-by the large C-type 140 Siwa was identified, with a small loss in terms of performance (i.e.
		In order to gain the best possible scientific information from an encounter with an asteroid a basic parameter is the distance between the probe and the body at the fly-by.
		The numerical integrations concentrated on the largest body, 140 Siwa, while some useful quantities have been analytically calculated for all the asteroids listed in Table 1.
	apollo.cnuce.cnr.it /~rossi/publications/nagoya/node2.html (490 words)

	ESA Science & Technology: Romantic rendezvous with Eros previews Rosetta's rock show
		Such rapid spin will be an advantage during Rosetta's flyby, enabling its instruments to image and measure the asteroid's characteristics at high resolution during one complete rotation.
		With a diameter of around 110 km, Siwa is much larger than any asteroid so far examined by spacecraft.
		At this time, Siwa will be at 2.75 AU from the Sun and 3.11 AU from the Earth, so signals from the spacecraft will take 26 minutes to reach ground stations.
	sci.esa.int /science-e/www/object/index.cfm?fobjectid=12190 (754 words)

	Rosetta To Play Orbital Mechanics To Reach Comet Churyumov-Gerasimenko
		The second asteroid target would be 21 Lutetia, a big asteroid about 100 km wide which Rosetta would fly past at about 55,000 km per hour in July 2010.
		While Lutetia is about the same size as Siwa, it is definitely odder -- it's one of the biggest of the so-called "M-class" asteroids, which until recently have been thought to be made largely of metallic nickel-iron alloy of the type that makes up many recovered meteorites.
		M-class asteroids (tagged, like the other declared classes of asteroids, by the near-infrared spectra of their rocks as seen from Earth) are rather uncommon -- they make up only about 4 percent of asteroids.
	www.spacedaily.com /news/rosetta-03e.html (1217 words)

	MBCAA Observatory. Siwa
		Asteroid 140 Siwa orbits the Sun in 4.5 yr:
		The observations were carried out with a 203mm f/6.3 SC telescope, a Clear filter and a SBIG ST7E camera (KAF401E CCD).
		The available comparison stars are much dimmer than Siwa.
	mbond.free.fr /Siwa/Siwa.htm (513 words)

	Rosetta / Philae
		On the way, there were to be two asteroid flybys (4979 Otawara, 11.07.2006; 140 Siwa, 24.07.2008).
		Shifts in the spacecraft's radio signals are used to measure the mass, density and gravity of the nucleus; define the comet's orbit; and study the inner coma.
		Also used to measure the mass and density of asteroid Siwa, and to study the solar corona during the periods when the spacecraft, as seen from Earth, is passing behind the Sun.
	www.skyrocket.de /space/doc_sdat/rosetta.htm (717 words)

	[34.14] Near-IR spectroscopy of new asteroid targets for the Rosetta mission
		This paper presents the spectra of asteroids 21 Lutetia, 89 Julia, 140 Siwa and (5480) 1989 YK8.
		Near-IR spectra of 140 Siwa and 21 Lutetia are consistent with the typical featureless C-type spectrum, with an increasing slope of 3% and 2.5% respectively.
		The spectra of 89 Julia and (5480) 1989 YK8 reveal absorption bands around 1 and 2 microns respectively which may indicate the presence of pyroxene and olivine-pyroxene mixtures.
	www.aas.org /publications/baas/v35n4/dps2003/59.htm (260 words)

	RASNZ Occultation Section - Siwa Occultation Update
		OCCULTATION BY (140) SIWA - 2003 DEC 27
		On 2003 Dec 27 UT, the 109 km diameter asteroid (140) Siwa will occult a 11.6 mag star in the constellation Virgo for observers along a path across the North West tip of New Zealands North Island.
		In the case of an occultation, the combined light of the asteroid and the star will drop by 2.6 mag to 14.1 mag (the magnitude of the asteroid) for at most 3.4 seconds.
	occsec.wellington.net.nz /planet/2003/updates/031227_140_2315_u.htm (634 words)

	Rosetta - Summary
		The mission includes flybys of asteroids (4979) Otawara and (140) Siwa and measurements of the trailing dust of Comet 46P/Wirtanen.
		The spacecraft will fly by Earth and Mars in 2005, asteroid Otawara in 2006, Earth again in 2007 and Siwa in 2008 prior to its rendezvous with comet 46P/Wirtanen in 2011 for a 2-year observation mission.
		The Rosetta Science Instruments will be made up of an Imager, IR and UV spectrometers, plasma package, radio sounder to investigate subsurface layering of materials, magnetometer, particle analysis instruments.
	www.spaceandtech.com /spacedata/logs/2003/rosetta_sum.shtml (421 words)

	ABSTRACT (Site not responding. Last check: 2007-10-03)
		The ROSETTA spacecraft will fly-by a few asteroids during its course to the final cometary target.
		The candidate asteroids presently are 140 Siwa (C-type) and 4979 Otawara.
		In the case of 140 Siwa the borders of the zone (for mm-sized particles) stretch to about 420
	apollo.cnuce.cnr.it /~rossi/publications/nagoya/node1.html (251 words)

	RASNZ Occultation Section - Siwa Occultation Update
		UPDATE: 2004 JAN 06, 21:08 UT (Note: The duration given in the line below is the interval during which the occultation shadow sweeps across the Earth - please see the minute markers on the map to determine the approximate the time for your location)
		On 2004 Feb 02 UT, the 109 km diameter asteroid (140) Siwa will occult a 10.4 mag star in the constellation Libra for observers along a path across S Australia.
		In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 13.7 mag (the magnitude of the asteroid) for at most 5.6 seconds.
	occsec.wellington.net.nz /planet/2004/updates/040202_140_2389_u.htm (627 words)

	140 siwa - OneLook Dictionary Search (Site not responding. Last check: 2007-10-03)
		Sorry, no dictionaries indexed in the selected category contain the phrase 140 siwa.
		You can look up the words in the phrase individually using these links: 140 siwa
		If you're sure it's a word, try doing a general web search for 140 siwa: Google, AltaVista
	www.onelook.com /?w=140+siwa (87 words)

	Update for (140) Siwa - January 16/17, 2003
		In the night of January 16/17, 2003 a faint 10.9 mag star TYC 0835-01394-1 will be occulted by a 114 km asteroid (140) Siwa.
		This update is based on USNO/Flagstaff astrometry for the asteroid and recent UCAC star position.
		Data for the minor planet: * general information: number, name: (140) Siwa approx.
	mpocc.astro.cz /updates/2003/0117siw.html (318 words)

	Comet Space Missions
		Contour Project Homepage; Contour info from NSSDC; Contour page (JPL Stardust server)
		Rosetta (ESA): Originally scheduled for launch in January 2003, this spacecraft was to softland on comet 46P/Wirtanen in 2011 after one gravity assist flyby at Mars and two at Earth, and after passing by two asteroids (4979 Otawara and 140 Siwa).
		Now, Rosetta was successfully launched on March 2, 2004 with an Ariane V from Kourou, and soon after launch, deployed its solar panels.
	www.seds.org /~spider/spider/Comets/c_missions.html (850 words)

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