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Topic: Shadow of Phobos on Mars

Related Topics

Transit of Phobos from Mars

Transit of Deimos from Mars

Time and date and astronomy on Mars

Transit of Jupiter from outer planets

Transit of Earth from Mars

Phobos (moon)

Transit of Venus from Mars

Astronomical transit

Transit of Earth from Saturn

Transit of asteroids

Transit of Saturn from outer planets

Transit of Earth from Jupiter

Deimos (moon)

List of features on Phobos and Deimos

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	Mars Astrobiology Magazine
		The shadow of Phobos was seen during the Viking missions in the late 1970s, and in fact one day the shadow was observed to pass right over the Viking 1 lander--a good test of orbital mechanics and triangulation on Viking's precise location.
		Phobos was the target of the ill-fated Phobos 1 and Phobos 2 spacecraft, launched by the Soviet Union in 1988.
		Phobos 2 actually reached Mars in 1989 and obtained a few pictures of the satellite---it also captured the shadow of Phobos cast upon the martian surface using its thermal infrared imager, Termoskan.
	mars.astrobio.net /news/print.php?sid=219 (1889 words)

	Shadow of Phobos on Mars - Wikipedia, the free encyclopedia
		The penumbral shadow of Phobos on the Martian landscape, as seen by Mars Global Surveyor on August 26, 1999.
		The penumbral shadow of Phobos on Mars on September 1, 1999 as imaged by Mars Global Surveyor.
		Phobos is so close to Mars that it is not visible south of 70.4°S or north of 70.4°N; for some days in the year, its shadow misses the surface entirely and falls north or south of Mars.
	en.wikipedia.org /wiki/Shadow_of_Phobos_on_Mars (1149 words)

	Untitled Document
		The sky of Mars is yellow-brown at noon, and is pinkish at sunset.
		As the orbits of Phobos and Deimos lie near the plane of Mars' equator, and due to the proximity of the moons to Mars, Phobos (and its eclipses) cannot be seen above Martian latitude 69º, and Deimos (and its eclipses) cannot be seen above latitude 82 º.
		Interestingly, the orbit of Phobos is decaying; the doomed moon is very slowly spiraling downward to the surface of Mars, and it is expected that within about 50 million years the moon will either crash on the surface of the planet or explode under the tidal forces of Mars forming rings like those of Saturn.
	www.bibalex.org /eclipse2006/MarsEclipses.htm (1087 words)

	Phobos Shadows
		The 1324-orbit gap in the shadow image sequences between November 7, 1999 and February 23, 2000 is the result of the shadow of Phobos being north of the North Pole, as I mentioned above.
		The Surface Locus of the Shadow of Phobos
		This can’t be the shadow of anything in orbit around Mars, unless it is very low in altitude because its length is much too long, judging from the length of the Phobos shadow.
	home1.gte.net /res00bfl/phobos_shadows.htm (4732 words)

	ESA - Mars Express - Light and shadow on the surface of Mars
		Phobos is the larger of the two Martian moons, 27 kilometres by 22 kilometres in size, and travels around Mars in an almost circular orbit at an altitude of about 6000 kilometres.
		The shadow of Phobos has an elliptical shape on the Martian surface, because the shadow’s cone hits the surface at an oblique angle.
		The shadow moves across the surface with a speed of roughly 7200 kilometres per hour from west to east.
	www.esa.int /SPECIALS/Mars_Express/SEMG35MVGJE_0.html (614 words)

	Mars Articles - 3
		The shadow of Phobos was seen during the Viking missions in the late 1970s, and in fact one day the shadow was observed to pass right over the Viking 1 lander.
		Phobos 2 actually reached Mars in 1989 and obtained a few pictures of the satellite -- it also captured the shadow of Phobos cast upon the martian surface using its thermal infrared imager, Termoskan.
		Instruments aboard the Mars Global Surveyor have detected magnetic striations that closely resemble the magnetic signature of crustal spreading and continental drift on the Earth, researchers report in a study to be published Friday in the journal Science.
	www.crystalinks.com /marsarticles3.html (3773 words)

	Mars Express catches Phobos' shadow - The Planetary Society Blog \| The Planetary Society
		The shadow is smeared because both Phobos and Mars Express were moving as the image was taken over the course of several seconds.
		The shadow is also darker at the center than the middle because, as seen from the surface of Mars, Phobos' diameter is much smaller than the disk of the Sun.
		Then Phobos' shadow appears to move from left to right as you look at the green, then nadir, then blue channels, and finally, in the most backward-pointing channel, which was captured last, Phobos' shadow has passed outside the field of view again.
	www.planetary.org /blog/article/00000461 (573 words)

	ORRERY: Mars' Moons - Phobos & Deimos
		Both Phobos and Deimos are very close to the planet compared to Earth's Moon.
		Phobos is the larger of the two, but would appear from the surface to be about 1/3 of the size of our Moon.
		From Mars, Phobos is seen to rise then set in only 4 hours.
	www.harmsy.freeuk.com /phobos.html (387 words)

	MarsNews.com :: The Shadow of Phobos
		Posted by jburk to General News at February 17, 2006 06:02 PM Mars' moon Phobos casts its shadow across the surface of the Red Planet in this photograph captured by ESA's Mars Express.
		Phobos is only 27 kilometres by 22 kilometres in size (17 x 14 miles), and it orbits Mars once every 7.5 hours.
		And it would be over quickly - the shadow moves at 7200 km/h (4400 mph).
	www.marsnews.com /archives/2006/02/17/the_shadow_of_phobos.html (96 words)

	Mars and its strange Moons
		Phobos 2 was also ultimately lost in the most intriguing circumstances, but not before it had beamed back certain images and information from the planet Mars itself.
		The latter cast a shadow that was a rounded ellipse and fuzzy at the edges, as would be cast by the uneven surface of the moonlet.
		The 'anomaly' seen in the Phobos 2 transmission was a thin ellipse with very sharp rather than rounded points (the shape is known in the diamond trade as a "marquise") and the edges, rather than being fuzzy, stood out sharply against a kind of halo on the Martian surface.
	www.ufos-aliens.co.uk /cosmicmars.htm (3294 words)

	In 1999, the Mars Global Surveyor took three photographs of Mars’ satellite Phobos with its high-resolution camera
		I objected that the problem with his interpretation was that the orientation of the long axes of the crater ellipses in the image suggested strongly that the MGS took the image from almost a horizontal position relative to the moon's surface.
		The length of the shadow is 53 pixels and the width of the object is 15.
		But there is another clue besides the shadow length that suggests this monolith on Phobos has an appreciable height: the craters are nearly circular, indicating the spacecraft was looking almost straight down at the surface at this point in the photograph.
	www.vgl.org /webfiles/mars/phobos/phobos.htm (1551 words)

	NASA - NASA Rovers Watching Solar Eclipses By Mars Moons
		Depending on the orientation of Phobos as it passes between the sun and the rovers, the images might also add new information about the elongated shape of that moon.
		Phobos is about 27 kilometers long by about 18 kilometers across its smallest dimension (17 miles by 11 miles).
		Because Mars is farther from the sun than Earth is, the sun looks only about two-thirds as wide from Mars as it does from Earth.
	www.nasa.gov /home/hqnews/2004/mar/HQ_04085_rovers_solar_eclipses.html (557 words)

	Transit of Phobos from Mars - Wikipedia, the free encyclopedia
		Viewed from orbit, the penumbral shadow of Phobos is observed to move rapidly over the Martian surface, passing over the spots that observe a transit.
		This shadow on the Martian surface was photographed on many occasions by Mars Global Surveyor and by earlier space probes (see Shadow of Phobos on Mars).
		Because they orbit Mars in low-inclination equatorial orbits, the shadows of Phobos or Deimos projected onto the surface of Mars exhibit a seasonal variation in latitude.
	en.wikipedia.org /wiki/Transit_of_Phobos_from_Mars (740 words)

	Re-examining the Lost Mars Probes of 1989-1993
		But in March of 1989 the Russian spacecraft Phobos II, programmed for intensive studies of the geology of the red planet, disappeared from the Russian tracking system as it was performing a preliminary survey of the Martian surface.
		One of the last images relayed to earth in detail by the Phobos II camera before data transmission was lost was an enormous elliptical shadow on the surface of Mars -- cigar-shaped, and an estimated 25-27 kilometers (approxi- mately 16 miles) in length.
		The sighting of the shadow on Mars should be enough to convince many that there may be intelligent life orbiting Mars, but in August of 1993 another event of major proportions took place that sent a tremendous rumble through the US space program.
	www.keysofenoch.org /html/lost_mars_probes.html (911 words)

	The Strange Case Of Russia's Phobos-2 Mars Probe
		And indeed, cigar-shaped shadows were plainly visible in many of the 37 photographs that the doomed probe sent back to Earth during the 60 days it survived circling Mars.
		So the roundish shadow of Phobos was on Mars's surface, within the field of view of the scanner, when the scanner was looking "down sun" at Mars.
		Selivanov explained that if the probe had been rock steady, the Phobos shadow would have left a dark streak right through the entire center of each image, as the image was assembled line-by-line over the course of each orbit.
	www.rense.com /general2/phobos.htm (1348 words)

	Phobos
		Phobos is remarkable in that it orbits Mars three times a day.
		Phobos has a very low density close to 2000 kg per cubic meter.Phobos shines down on Mars with a visual magnitude of approximately -10.
		The image collection shows Phobos in different orientations as seen from orbits 748, 413, 649, 682 and 715 (from clockwise from lower left), while the picture on the lower right is a mosaic made from the Super Resolution Channel on orbit 413.
	mysite.wanadoo-members.co.uk /blobrana/database/phobos.htm (765 words)

	Phobos: Rebuttal One
		However only the ratio of distances from center of Mars to the 11.6 star (0.609 inches), and the ratio of what he calls Deimos to the center of Mars (.625) is close enough to call similar.
		In fact the shadows that he believes are Phobos, we believe are in fact surface features, and or the shadows of those surface features.
		Phobos, without exception, in every image, is too far off the limb of Mars to cause its shadow to fall upon Mars.
	www.tmgnow.com /repository/cometary/76P_phobos3.html (3439 words)

	Mars Exploration Rover Mission: Press Release Images: Spirit
		The primary difference between terrestrial and martian eclipses is that Mars' moons are too small to completely block the Sun from view during solar eclipses.
		Phobos, the larger of the two martian moons, was photographed while slipping into the shadow of Mars.
		The precise position of Phobos will be important to any future spacecraft taking detailed pictures of the moon or landing on its surface.
	marsrovers.jpl.nasa.gov /gallery/press/spirit/20051115a.html (562 words)

	CNN - Surveyor's camera catches martian solar eclipse - November 3, 1999 (Site not responding. Last check: 2007-11-07)
		In this series the shadow of Phobos is visible as it crosses the southern Elysium Planitia, the northern Lunae Planum and Kasei Valles areas of Mars.
		Color composite view of the shadow of Phobos as it was cast upon western Xanthe Terra on August 26, about 2 p.m.
		Phobos and Mars' more distant moon, Deimos, were discovered in 1877 by Asaph Hall, an astronomer at the United States Naval Observatory in Washington, D.C. The $150 million Mars Global Surveyor mission was launched in 1996 and arrived at Mars the following year.
	www.cnn.com /TECH/space/9911/03/mars.eclipse/index.html (431 words)

	Universe Today - The Shadow of Phobos
		This image, taken by the High Resolution Stereo Camera (HRSC) on board ESA's Mars Express spacecraft, shows the fast-moving shadow of the moon Phobos as it moved across the Martian surface.
		They confirm the model of the moon's orbit around Mars, as it was determined earlier in 2004 also on the basis of HRSC images.
		When it is between the Sun and Mars, Phobos casts a small and diffuse shadow onto the Martian surface.
	www.universetoday.com /am/publish/mars_light_shadow.html?1722006 (663 words)

	WTP: Mars: Martian Solar Eclipses
		The shadow of the Martian moon, Phobos, is captured here by the Mars Global Surveyor wide angle camera.
		Frequent solar eclipses are caused by the passage of Phobos between Mars and the Sun.
		The shadow of Phobos, the elliptical feature at the center of each frame, is seen as it was cast upon western Xanthe Terra.
	pds.jpl.nasa.gov /planets/captions/mars/eclipses.htm (114 words)

	JPL.NASA.GOV: Mars Exploration Rovers
		NASA's Mars Exploration Rover Spirit observed the Martian moon Phobos entering the shadow of Mars during the night of the rover's 675th sol (Nov. 27, 2005).
		The panoramic camera captured 16 images, spaced 10 seconds apart, covering the period from when Phobos was in full sunlight to when it was entirely in shadow.
		As with our own Moon during lunar eclipses on Earth, even when in the planet's shadow, Phobos was not entirely dark.
	www.jpl.nasa.gov /missions/mer/images.cfm?id=1829 (182 words)

	Mars
		This is a wide angle view of the martian north polar cap as it appeared to the Mars Global Surveyor in early northern summer.
		This is the south polar cap of Mars as it appeared to the Mars Global Surveyor on April 17, 2000.
		The images show a wide angle red (left), blue (middle), and color composite (right) view of the shadow of Phobos (elliptical feature at center of each frame) as it was cast upon western Xanthe Terra on August 26, 1999, at about 2 p.m.
	faculty.rmwc.edu /tmichalik/mars.htm (1248 words)

	Meta Science in the News
		Editorial on "Mirrored Images" Discussion of why splitting Mars (or other) images and mirroring half of them is invalid in investigations of possible artificiality.
		Moreover, the moons of Mars are too faint to be seen by any but the world’s largest telescopes except when they are close to Earth.
		However, when Mars was last close to Earth in June 2001, the moons were within range of some smaller and medium-sized telescopes, and were routinely observed throughout the spring and summer months, at least through the end of July.
	www.metaresearch.org /home/Viewpoint/Meta-in-News.asp (2124 words)

	SPACE.com -- Moonshadows Seen on Mars
		The shadow in the center is that cast by Phobos.
		An observer on Mars would have a much greater chance of seeing an eclipse, but that viewer would never be able to witness a total solar eclipse.
		Because of its distance from Mars, the sun appears to be about two-thirds the size it looks from Earth, but Phobos and Deimos are not large enough to block out the whole solar disk.
	www.space.com /news/moc-moonshadow_991102.html (428 words)

	mars_crew
		The logistics of a crewed mission to Mars are complex to say the least.
		The human exploration of Mars raises valid scientific questions of interplanetary biological contamination which must be addressed before the departure of a crewed mission.
		Indeed, especially if a crewed mission to Mars is a precursor to human settlement of the Red Planet, these uncertainties must be thoroughly investigated by the visionaries who strive to implement a human Mars exploration program.
	nssdc.gsfc.nasa.gov /planetary/mars/mars_crew.html (513 words)

	Glen Deen's Home Page
		The Phobos Mystery Continues (Aug. 8, 2001) Published and later deleted by YOWUSA.
		Phobos Impacting the Moon May 31, 2003 (Nov. 13, 2001) Includes a picture of eclipse at impact from Lit, Sweden.
		Phobos Shadows (May 2, 2002) The shadow of Phobos on Mars on September 20, 2000 rules out any earlier escape.
	home1.gte.net /res00bfl/index.htm (303 words)

	Mars Global Surveyor MOC2-1365 Release (Site not responding. Last check: 2007-11-07)
		Arsia Mons with water ice clouds and shadow of Phobos on 28 January 2006.
		The dark oval to the northeast of Arsia Mons, as noted above, is the shadow of Phobos.
		The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, California and Denver, Colorado.
	www.msss.com /mars_images/moc/2006/02/06 (322 words)

	Astronomy Picture of the Day 3-29-03
		In fact, since its orbital period is shorter than the planet's rotation period, Mars-based observers see Phobos rise in the west and set in the east - traveling from horizon to horizon in about 5 1/2 hours.
		Standing in the shadow of Phobos, you would see the Martian version of a solar eclipse!
		Both Phobos and Deimos seem to be captured asteroids.
	www.freerepublic.com /focus/f-chat/878973/posts (619 words)

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