Alpha Capricornids
Alpha Capricornids | |
---|---|
![]() Celestial map of Capricornus | |
Discovery date | 1871 |
Parent body | 169P/NEAT (2002 EX12)[1] |
Radiant | |
Constellation | Capricornus |
Right ascension | 20h 44m 00s |
Declination | −10° 00′ 00″ |
Properties | |
Occurs during | July 7 to August 15[2] |
Date of peak | July 31[2] |
Velocity | 23 km/s |
Zenithal hourly rate | 5 |
See also: List of meteor showers |
Alpha Capricornids is a meteor shower that takes place as early as 7 July and continues until around 15 August.[2] The meteor shower was discovered by Hungarian astronomer Miklos von Konkoly-Thege in 1871.[3] This shower has infrequent but relatively bright meteors, with some fireballs. Parent body is comet 169P/NEAT.
Peter Jenniskens and Jeremie Vaubaillon identified the parent body as asteroid 2002 EX12, which in the return of 2005 was found weakly active near perihelion.[1] This object is now called comet 169P/NEAT.
According to Jenniskens and Vaubaillon, the meteor shower was created about 3,500 to 5,000 years ago, when about half of the parent body disintegrated and fell into dust.[1] The dust cloud evolved into Earth's orbit recently, causing a shower with peak rates of 2-5/h, sometimes having outbursts of bright flaring meteors with rates up to 5-9/h.
The bulk of the dust will not be in Earth's path until the 24th century. The Alpha Capricornids are expected to become a major annual storm in 2220–2420 A.D., one that will be "stronger than any current annual shower."[1]
References
- ^ a b c d Jenniskens, P.; Vaubaillon, J. (2010). "Minor planet 2002 EX12 ( = 169P/NEAT) and the Alpha Capricornid shower". Astronomical Journal. 139 (5): 1822–1830. Bibcode:2010AJ....139.1822J. doi:10.1088/0004-6256/139/5/1822. S2CID 59523258. Retrieved 8 July 2014.
- ^ a b c Robert Lunsford (21 July 2022). "Meteoric Activity for 23-29 July 2022". MeteorNews. Retrieved 21 July 2022.
- ^ "Alpha Capricornids: Encyclopedia Article". Encarta.msn.com. Encarta. Archived from the original on 19 April 2009. Retrieved 8 July 2014.
External links
- Interactive visualization of Alpha Capricornids meteor stream
- -4 magnitude Alpha Capricornid shooting past Delphinus on July 17, 2006. Sigma 20 mm f/1.8
- v
- t
- e
- Andromedids
- Antihelion Source
- Aquariids
- eta Aquariids
- kappa Aquariids
- North delta Aquariids
- North iota Aquariids
- South iota Aquariids
- Southern Delta Aquariids
- tau Aquariids
- Aquilids
- South June Aquilids
- Arietids
- Daytime eps. Arietids
- Daytime May Arietids
- Aurigids
- alpha Aurigids
- delta Aurigids
- Nov. iota Aurigids
- Bootids (June Bootids)
- Canis-Minorids
- Cancrids (delta Cancrids)
- Capricornids
- alpha Capricornids
- Daytime Capri.-Sagitt.
- Carinids (eta Carinids)
- Cassiopeids (beta Cassiopeids)
- Centaurids
- Cetids
- omega Cetids
- pi Cetids
- Comae Berenicids
- Cygnids (kappa Cygnids)
- Doradids (gamma Doradids)
- Draconids
- Eridanids (eta Eridanids)
- Geminids (epsilon Geminids)
- Herculids (tau Herculids)
- Hydrids (sigma Hydrids)
- Leonids
- Leonis Minorids (Dec. Leonis Minorids)
- Lyrids
- eta Lyrids
- June Lyrids
- Monocerotids
- Normids (gamma Normids)
- Orionids
- Pegasids
- Perseids
- Daytime zeta Perseids
- September epsilon Perseids
- Phoenicids (July Phoenicids)
- Piscis Austrinids
- Puppids (pi Puppids)
- Puppid-Velids
- Quadrantids
- Scorpiids
- alpha Scorpiids
- North omega Scorpiids
- South omega Scorpiids
- Serpentids (kappa Serpentids)
- Sextantids (Daytime Sextantids)
- Taurids
- Ursids
- Virginids
- alpha Virginids
- gamma Virginids
- eta Virginids
- theta Virginids
- iota Virginids
- lambda Virginids
- mu Virginids
- pi Virginids
- psi Virginids
- March Virginids
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Meteor_falling_courtesy_NASA.gif/65px-Meteor_falling_courtesy_NASA.gif)
- January 4
- February 8
- February 10
- March 14
- April 17
- April 22–23
- April 26
- May 6
- June 7
- June 27
- July 13
- July 28–29
- July 30
- July 31 – August 1
- August 13
- September 1
- October 8
- October 10
- October 21
- October 22
- November 9
- November 12
- November 18
- November 21–22
- December 5–6
- December 13–14
- December 15
- December 22
- See also
- List of meteor showers