|
Collection:
|
|
NASA Planetary Photo Journal Collection
Collection
NASA Planetary Photo Journal Collection
Collection
|
|
Title:
|
|
Impact at High Noon
Title
Impact at High Noon
Title
|
|
Original Caption Released with Image:
|
For people who live in mountain valleys, daylight can be a short-lived experience. Mountains to the east make the Sun rise later in the morning, while mountains to the west make the Sun set earlier in the evening. The brevity of daytime in a valley is accentuated during the shortened days of winter. The floor of the 5.5-kilometer (3.4-mile) diameter impact crater that dominates one face of Eros experiences the ultimate in short daylight hours. Three factors conspire to make this true. Firstly, Eros rotates rapidly, once every 5.27 hours. Secondly, the crater's 0.9-kilometer (0.56-mile) high walls tend to block direct sunlight from the floor, even while the outside of the crater is illuminated. Thirdly, during the current season on Eros, the Sun never makes it high in the sky in this location. This NEAR Shoemaker image, taken April 1, 2000, from a range of 209 kilometers (130 miles), caught the crater near local noon with the Sun highest in the sky. On that day, a hardy astronaut standing at the bottom of the crater would have experienced 1 hour and 45 minutes of daylight. Built and managed by The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, NEAR was the first spacecraft launched in NASA's Discovery Program of low-cost, small-scale planetary missions. See the NEAR web page at http://near.jhuapl.…for more details.
Original_Caption_Rel eased_with_Image
For people who live in mountain valleys, daylight can be a short-lived experience. Mountains to the east make the Sun rise later in the morning, while mountains to the west make the Sun set earlier in the evening. The brevity of daytime in a valley is accentuated during the shortened days of winter. The floor of the 5.5-kilometer (3.4-mile) diameter impact crater that dominates one face of Eros experiences the ultimate in short daylight hours. Three factors conspire to make this true. Firstly, Eros rotates rapidly, once every 5.27 hours. Secondly, the crater's 0.9-kilometer (0.56-mile) high walls tend to block direct sunlight from the floor, even while the outside of the crater is illuminated. Thirdly, during the current season on Eros, the Sun never makes it high in the sky in this location. This NEAR Shoemaker image, taken April 1, 2000, from a range of 209 kilometers (130 miles), caught the crater near local noon with the Sun highest in the sky. On that day, a hardy astronaut standing at the bottom of the crater would have experienced 1 hour and 45 minutes of daylight. Built and managed by The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, NEAR was the first spacecraft launched in NASA's Discovery Program of low-cost, small-scale planetary missions. See the NEAR web page at http://near.jhuapl.…for more details. Original Caption Released with Image
|
|
Addition Date:
|
|
2000-06-10
Addition_Date
2000-06-10
Addition Date
|
|
Produced By:
|
|
Johns Hopkins University/APL
Produced_By
Johns Hopkins University/APL
Produced By
|
|
Mission:
|
|
NEAR
|
|
Spacecraft:
|
|
NEAR Shoemaker
Spacecraft
NEAR Shoemaker
Spacecraft
|
|
Target Name:
|
|
Eros
Target_Name
Eros
Target Name
|
|
Is a satellite of:
|
|
Sol (our sun)
Is_a_satellite_of
Sol (our sun)
Is a satellite of
|
|
Instrument:
|
|
Multi-Spectral Imager
Instrument
Multi-Spectral Imager
Instrument
|
|
Product Size:
|
|
372 samples x 477 lines
Product_Size
372 samples x 477 lines
Product Size
|
|
Primary Data Set:
|
|
NEAR Home Page
Primary_Data_Set
NEAR Home Page
Primary Data Set
|
|
facet_what:
|
|
Sun
facet_what
Sun
facet_what
|
|
facet_what:
|
|
Crater
facet_what
Crater
facet_what
|
|
facet_what:
|
|
Imager
facet_what
Imager
facet_what
|
|
facet_what:
|
|
NEAR Shoemaker
facet_what
NEAR Shoemaker
facet_what
|
|
facet_what:
|
|
Multi-Spectral Imager
facet_what
Multi-Spectral Imager
facet_what
|
|
facet_where:
|
|
Maryland
facet_where
Maryland
facet_where
|
|
facet_where:
|
|
Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
|
|
facet_when:
|
|
April 1, 2000
facet_when
April 1, 2000
facet_when
|
|
facet_when_year:
|
|
2000
facet_when_year
2000
facet_when_year
|
|
Image #:
|
|
PIA02499
|
|
UID:
|
|
SPD-PHOTJ-PIA02499
UID
SPD-PHOTJ-PIA02499
UID
|
|
orignial url:
|
orignial_url
orignial url
|
