LRO at the June 15, 2011 Lunar Eclipse: Earth View
For Lunar Reconnaissance Orbiter (LRO), the lunar eclipse on June 15, 2011 is likely to be the longest and darkest of its life. This matters because LRO relies on sunlight to power its systems and instruments. Although it spends half of every orbit on the night side of the Moon, each night side pass lasts only an hour. For the June 15 eclipse, LRO will be in the dark for more than twice as long.
During a previous total eclipse, LRO hibernated, turning off all of its instruments to conserve its battery power until the Moon emerged from the Earth's shadow. For the June 15 event, LRO will leave on the Diviner Lunar Radiometry Experiment. Diviner will measure the cooling of the Moon's surface during the eclipse. This unique temperature record is expected to reveal information about the roughness and composition of the swath of lunar surface visible to Diviner's sensors during the eclipse.
The visualization archived on this page shows the eclipse as it might appear through a telescope on Earth (except that you can't see LRO in such a telescope). Celestial north is up. As the Moon enters the umbra (the part of the shadow in which the Sun is completely blocked by the Earth), the shadowed side of the Moon appears black while the sunlit side remains bright. Only when the Moon is almost completely within the umbra is it possible to see the faint red glow of the shadowed side, some 10,000 times fainter than the sunlit Moon. The redness is sunlight filtered and refracted by Earth's atmosphere. The same effect reddens sunrises and sunsets on Earth.
Other visualizations in this series depict the view of the eclipse
- from the Moon, where the event is a solar eclipse
- along the shadow line, with the figures of the umbra, penumbra, and lunar and solar paths
- flying above LRO as Diviner takes temperature measurements
The eclipse as seen from Earth.
The image layer containing the Moon and LRO, with alpha channel.
The star field layer.
Alpha channel for the clock overlay.
Print resolution view of the Moon and LRO just prior to the eclipse, at 17:13 UT.
Print resolution view of the eclipsed Moon and LRO at 19:06 UT.
Print-resolution view of the Moon and LRO at the time of greatest eclipse, 20:13 UT.
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio
MissionsThis visualization is related to the following missions:
Datasets used in this visualization
Clementine 750-nm BasemapID: 545Mosaic Collected with UVVIS Camera January - June 1994
LRO DEM (Digital Elevation Map)ID: 653Collected with LOLA August 2009 - December 2010
Note: While we identify the data sets used in these visualizations, we do not store any further details, nor the data sets themselves on our site.