cancerMeteor shower

Official name: cancer, delta meteor shower

Official name: the cancer the Delta Delta Carinids meteor shower

Activity time: on December 14th - on February 14

Great time: January 17

Maximum flow rate (ZHR) : 4

R: 3.0 when greatly

Great center: right ascension of 176 degrees declination - 17 degrees

Radiant point location: right ascension: 8 h 10 m (130 degrees), + 20 degrees declination

The rain characteristics description: two radiant point, meteor brightness is very bright

Telescope view center: 115 degrees right ascension and + 24 degrees declination right ascension of 140 degrees declination + 35 degrees (of latitude > + 40 degrees).Ascension 120 degrees declination - 3 degrees and 140 degrees declination right ascension - 3 degrees (40 degrees of latitude < +)

Observation were summarized: the meteor activity cycle is long - from December 14 to February 14, greatly in January 17, (longitude 297.3 degrees, 2000 epoch), maximum center in right ascension of 128 degrees, declination + 20 degrees.Another peak very weak time, appear in the January 19 (longitude 300.1 degrees, 2000 epoch), the radiant point is in the south of the main radiants 5 degrees, namely the right ascension of 133 degrees, declination + 14 degrees.Radiant point drift of right ascension + 1.0 degrees/day, 0.2 degrees declination - / day.

Track the root element: north group is one of the strongest in the cancer the delta meteor shower, for the group of the most perfect observation is Mr Carney, in 1968-1969 radio meteor plan, based on 37 meteor.South group is very weak, the orbit of the group of information based on radio observation data in 1961 and 1952-1954 of photographic materials.

The north of south group

Perihelion angular distance (epoch) 2000.0 291.1 degrees, 116.8 degrees

Longitude of ascending node (epoch) 2000.0 297.3 degrees, 120.1 degrees

Orbital inclination (epoch) 2000.0 1.5 degrees, 4.9 degrees

Distance of 0.397 AU 0.371 AU recently

Orbital eccentricity 0.783 0.77

Orbital half length to diameter 1.829 1.613