Lunar distance

(redirected from lunar distances)
See under Lunar.
the angular distance of the moon from the sun, a star, or a planet, employed for determining longitude by the lunar method.

See also: Distance, Lunar

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
NEOWISE has discovered 31 asteroids till now that pass within about 20 lunar distances from Earth's orbit, and 19 are more than 460 feet (140 meters) in size but reflect less than 10 percent of the sunlight that falls on them.
According to reports from the United Kingdom-based newspaper The Sun, some of these asteroids may come as close as 0.15 lunar distances to Earth-enough to warrant concern from the government body.
Astronomers will closely monitor The Rock as it comes within 4.6 lunar distances from Earth at 1.24pm UK time on Wednesday.
In 2004, the 3.1-mile (5-km) wide asteroid Toutatis passed about four lunar distances, or just under a million miles (1.6 million km) from Earth.
(2) The two major proposals to emerge--astronomical use of lunar distances and mechanical use of timekeepers --were complementary, although they have often been seen as rivals.
In the wake of NASA's recent LADEE mission, which demonstrated the feasibility of laser transmission from lunar distances at data rates high enough to stream movies, NASA is working with the Aerospace Corporation to test a CubeSat version of a similar system by early 2015.
On September 29, 2004, the asteroid zipped by Earth at only 0.01 AU -- about 4 lunar distances.
Close-approaches by NEOs during 2011 Designation Date Miss distance 2011 (LD) (AU) 2009 BS5 11-Jan 03.4 0.0087 2000 AZ93 11-Jan 18.6 0.0477 2009 QH6 16-Feb 16.0 0.0411 2008 UC202 27-Apr 08.9 0.0228 2009 UK20 02-May 08.6 0.0220 2009 BD 02-Jun 00.9 0.0023 2004 LO2 15-Jun 9.9 0.0255 2009 WW104 23-Jun 15.3 0.0392 2002 EM7 01-Jul 11.0 0.0284 2007 RQ17 22-Jul 13.2 0.0340 2007 DD 23-Jul 09.3 0.0239 2007 TD 23-Sep 03.8 0.0097 2010 GM65 12-Oct 14.9 0.0383 2009 TM8 17-Oct 01.1 0.0028 2005 YU55 08-Nov 00.8 0.0022 2004 BG41 14-Dec 13.0 0.0335 2000 YA 26-Dec 02.9 0.0074 Key: Miss distance given in terms of lunar distances (LD), the average distance between the Earth and Moon (3.84 x [10.sup.5] km), as well as astronomical units (AU).
Near-Earth asteroid 2010 RX30 is estimated to be 32 to 65 feet (10 to 20 meters) in size and will pass within 0.6 lunar distances of Earth (about 154,000 miles, or 248,000 kilometers) 10am GMT.
It was early realized that a decent clock would do the trick, but the necessary practical precision was not attained until the eighteenth century, and Tobias Mayer's distinct method of lunar distances was a useful prior contribution, which continued in use long after the commercial development of Harrison's chronometers.
Just last Wednesday a three-mile-wide asteroid called Toutatis passed within only four lunar distances of Earth.