PIA07433: In Tune with Neptune

In Tune with Neptune


The New Horizons Long Range Reconnaissance Imager (LORRI) observed Neptune on June 23, apl2010, as part of a test of the critical optical navigation Annual Checkout (ACO)-4. In this 100-millisecond exposure, taken when the spacecraft was 23.2 astronomical units (about 2.15 billion miles) from Neptune, the planet appears slightly larger than a star. At the time of this observation, the solar phase angle (the spacecraft-planet-Sun angle) was 34 degrees and the solar elongation angle (planet-spacecraft -Sun angle) was 95 degrees. Only New Horizons can observe Neptune at such large solar phase angles, which can be used to study the light-scattering properties of Neptune's atmosphere.

Cataloging Keywords:

Name Value Additional Values
Target Neptune Sun
System Neptune
Target Type Planet Sun
Mission New Horizons
Instrument Host New Horizons
Host Type Flyby Spacecraft
Instrument Long Range Reconnaissance Imager (LORRI)
Extra Keywords Atmosphere, Color, Visual
Acquisition Date
Release Date 2010-07-27
Date in Caption
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Source photojournal.jpl.nasa.gov/catalog/PIA07433
Identifier PIA07433