Alpha Capricornids |
Observer's Synopsis |
History |
*Stream II: This was the secondary stream noticed by Wright, Jacchia and Whipple. It is based on 5 meteors, which indicate a duration of August 8-21. The nodal passage occurs on August 15 (Solar Longitude=141.9°), at which time the radiant is at RA=322.4°, DECL=-13.1°.
*Stream III: This third stream is composed of 7 meteors, which indicate a
duration of July 15-August 1. The nodal passage occurs on July 25 (Solar
Longitude=122.2°), at which time the radiant is at RA=302.7°, DECL=-12.5°. It
is especially interesting that its semimajor axis of 2.069 AU is 20-25%
smaller than that determined for the other two streams.
Years | Ave. Mag. | No. Meteors | % trains | Observer(s) | Source |
---|---|---|---|---|---|
1960-1976 | 1.69 | 355 | --- | McLeod | MN, No. 32 |
1966-1982 | 2.41 | 106 | --- | West | MN, No. 61 |
1966-1981 | 2.03 | 38 | 5.1 | Swann | MN, No. 62 |
1967-1981 | 2.45 | 143 | --- | Hill | MN, No. 63 |
1977 | 2.6 | 31 | --- | Gates | MN, No. 38 |
1978 | 2.21 | 61 | 18.0 | WAMS | MN, No. 45 |
1982 | 2.09 | 241 | --- | WAMS | MN, No. 62 |
1982 | 1.72 | 14 | --- | Lunsford | Personal Comm. |
1986 | 2.52 | 55 | --- | Roggemans | Personal Comm. |
1986 | 2.38 | 8 | --- | Lunsford | Personal Comm. |
Orbit |
AOP | AN | i | q | e | a | |
---|---|---|---|---|---|---|
I | 266.5 | 128.6 | 7.8 | 0.597 | 0.785 | 2.777 |
II | 268.1 | 141.9 | 1.1 | 0.582 | 0.780 | 2.645 |
III | 272.2 | 122.2 | 5.4 | 0.573 | 0.723 | 2.069 |
The Alpha Capricornids were detected in both sessions of the Radio Meteor Project conducted during the 1960's. It should be noted that both sessions poorly covered the period of July 19-25, so that the values of W given below could potentially be smaller.
AOP | AN | i | q | e | a | |
---|---|---|---|---|---|---|
S1973 | 267.2 | 146.8 | 0.9 | 0.630 | 0.659 | 1.850 |
S1976 | 267.9 | 136.6 | 6.1 | 0.620 | 1.920 | 1.920 |
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