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A total [[solar eclipse]] occurred at the Moon's [[Lunar node|descending node]] of orbit between Saturday, March 8 and Sunday, March ...na|solar corona]], providing complement to the imperfections of the corona observation of the [[Solar and Heliospheric Observatory]] spacecraft.<ref>{{cite web|ti ...

...bles for Clearing the Lunar Distance and Finding Universal Time by Sextant Observation Including a Convenient Way to Sharpen Celestial Navigation Skills While On ...ion)|LD procedure]] […]}} [http://fer3.com/arc/m2.aspx/Tables-for-clearing-Lunar-Distances-from-Bruce-Stark-Kalivoda-jul-2003-w10812][https://web.archive.or ...

| discovered = 2 March 2011<br />{{small|(first observation only)}} ...1. The asteroid was expected to pass within 1 [[Lunar distance (astronomy)|lunar distance]] of Earth in early September 2020, but did not. There was no risk ...

...re called "Noon-Midnight" orbits. Such orbits are desirable for many Earth observation missions such as weather, imagery, and mapping. ...bservations of the same area of the Earth should be made under as constant observation conditions as possible. ...

...orbit]]—resulting in a slightly larger-than-usual [[apparent size]] of the lunar disk as viewed from Earth.<ref name="NYT-20140907">{{cite news |author=Staf ...tance at the greatest [[apogee]] of the year, and <math>ld_p</math> is the lunar distance at the smallest [[perigee]] of the year.<ref>{{Cite web|url=http:/ ...

...s consistent with that of an Sv-type asteroid or perhaps [[lunar meteorite|lunar ejecta]].<ref name="GTC-spectrum"/><ref>{{Cite web |author1=Robert Lea |dat ...nocchia |first4=Davide |last5=Sharkey |first5=Benjamin N. L. |title=On the Lunar Origin of Near-Earth Asteroid 2024 PT5 |journal=The Astrophysical Journal L ...

...> Due to its Earth-like orbit, the object might be of artificial origin or lunar ejecta.<ref name="MPEC2022-O04"/> However, visible spectroscopy obtained wi ...mporarily-captured flyby in 1981, had another one in 2022, and the current observation arc predicts it will become a mini-moon again in 2051.<ref name="minimoon"/ ...

...d has a low inclination relative to Earth's orbit.<ref name="spaceguard"/> Observation by the [[Very Large Telescope]] (VLT) 8 meter facilities on 22 May and 19 J | 2014-07-01 || {{convert|0.0966|AU|km mi|abbr=on|lk=on}} (37.6 [[Lunar distance (astronomy)|LD]]) ...

{{Short description|Proposed concept lunar orbiter}} | publisher =NASA Lunar Science Institute ...

...e among the most widely used [[scientific instrument]]s in exploratory and observation satellites. These instruments were instrumental in mapping the [[Van Allen ...assessed.<ref name="deep space chronicle"/> Eventually the USSR managed a lunar impact with "[[Luna 2]]", a three component magnetometer, finding no signif ...

...n = WT1190F entering the atmosphere over Sri Lanka, viewed by the airborne observation team | periapsis = {{convert|21222|km|mi|abbr=on}} (0.055&nbsp;[[Lunar distance (astronomy)|LD]]; 3.33&nbsp;[[Earth radius|ER]]) ...

| moid = 0.2354 AU{{·}}91.7 [[Lunar distance (astronomy)|LD]] ...the body's [[observation arc]] by 20 years prior to its official discovery observation at Anderson Mesa.<ref name="MPC-object" /> ...

...y Risk Table]] on 16 October 2017<ref name="removed"/> and with a 5-year [[observation arc]] has a well-known orbit.<ref name="jpldata" /> For example, on the pre ...of passing between 0.00008818 and 0.002896&nbsp;AU (0.034 to 1.127&nbsp;[[Lunar distance (astronomy)|LD]], 13,200–433,200&nbsp;km, 8,200–269,200&nbsp;mi) f ...

...e developed only in the late 1940s and early 1950s. As to the experimental observation of this shift, it also had to await the development of a new technique, tha ...960PhRvL...4..412K}}</ref> in 1960, two years after its first experimental observation in atomic spectroscopy.<ref name=Meliss1959/> By measuring this shift, one ...

...roid's [[observation arc]] begins 29 years prior to its official discovery observation, with a [[precovery]] taken at [[Palomar Observatory]] in April 1971.<ref n |journal = 41st Lunar and Planetary Science Conference ...

| moid = 0.0025&nbsp;AU (1&nbsp;[[Lunar distance (astronomy)|LD]]) ...interval.<ref name="risk-table2016"/> Observations in 2019 extended the [[observation arc]] by four years and detected a favourable [[Yarkovsky effect]], which r ...

| Lunar base |title = Observation of collecting process of liquid droplets in Liquid Droplet Radiator ...

...e="Hapke 1993 10C"/><ref>Minnaert, M. (1941). The reciprocity principle in lunar photometry, ''Astrophysical Journal'' '''93''': 403-410.[http://adsabs.harv Simply put, in suitable conditions, the principle states that the source and observation point may be switched without changing the measured intensity. Intuitively, ...

...pace probes and on crewed lunar missions. Small fission reactors for Earth observation satellites, such as the [[TOPAZ nuclear reactor]], have also been flown.<re ...on in the spacecraft's service module. Upon reentering the atmosphere, the lunar module equipped with the [[SNAP-27]] RTG exploded and crashed into the Sout ...

The solar heating model is centered around the observation that the visible geysers were located between 50° and 57°S; at the time of ...|bibcode=1999LPI....30.1766S |location=Houston, TX |conference=30th Annual Lunar and Planetary Science Conference |id=1766 |access-date=4 April 2024 |archiv ...