OO

OO or oo may refer to:

See also

List of Latin-script digraphs

This is a list of digraphs used in various Latin alphabets. Capitalization involves only the first letter (ch – Ch) unless otherwise stated (ij – IJ).

Letters with diacritics are arranged in alphabetic order according to their base. That is, ⟨å⟩ is alphabetized with ⟨a⟩, not at the end of the alphabet as it would be in Norwegian, Swedish and Danish. Substantially modified letters such as ⟨ſ ⟩ (a variant of ⟨s⟩) and ⟨ɔ⟩ (based on ⟨o⟩) are placed at the end.

Apostrophe

⟨’b⟩ (capital ⟨’B⟩) is used in the Bari alphabet for /ɓ/.

⟨’d⟩ (capital ⟨’D⟩) is used in the Bari alphabet for /ɗ/.

⟨’y⟩ (capital ⟨’Y⟩) is used in the Bari alphabet for /ʔʲ/. It is also used for this sound in the Hausa language in Nigeria, but in Niger, Hausa ⟨’y⟩ is replaced with ⟨ƴ ⟩.

A

⟨a’⟩ is used in Taa orthography, where it represents the glottalized or creaky-voiced vowel /a̰/.

⟨aa⟩ is used in the orthographies of Dutch, Finnish and other languages with phonemic long vowels for /aː/. It was formerly used in Danish and Norwegian (and still is in some proper names) for the sound /ɔ/, now spelled ⟨å⟩.

2014 OO6

2014 OO₆ (also written 2014 OO6) is an Apollo near-Earth asteroid discovered in 2014 and was the most dangerous one discovered in 2014 that remained on the Sentry Risk Table as of early December 2014. The asteroid is estimated to be roughly 75 meters (246 ft) in diameter and had a 1 in 83,000 chance of impacting Earth on 11 January 2051. However, the nominal best-fit orbit shows that 2014 OO₆ will be 1.5 AU (220,000,000 km; 140,000,000 mi) from Earth on 11 January 2051.

It was discovered on 27 July 2014 by Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope. On 18 August 2014 the asteroid passed 0.02975 AU (4,451,000 km; 2,765,000 mi) from Earth. By 23 August 2014, the asteroid had dimmed to below magnitude 25. As of early December 2014, the asteroid had an observation arc of 24 days with an uncertainty parameter of 7.2014 OO₆ was recovered by Cerro Paranal Observatory on 23 and 26 December 2014 at magnitude 25 which extended the observation arc from 24 days to 154 days. The orbital refinement removed the impact risk for 11 January 2051.