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TOPIC: Asteroid 3200 Phaethon (1983 TB)


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RE: Asteroid 3200 Phaethon (1983 TB)
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Asteroid 3200 Phaethonmakes its closest approach to the Earth(1.325 AU)on the 26th October, 2012



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Asteroid (3200) Phaethonmakes its closestapproachto the Earth(0.873 AU) on the 2nd May, 2012.

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2012 05 02 02 41 07.2 +13 00 47 0.8737 0.1404 2.5 161.6 21.6
2012 05 03 02 28 40.3 +13 22 17 0.8802 0.1427 3.8 151.7 18.9
2012 05 04 02 17 54.5 +13 56 39 0.9011 0.1570 6.9 129.5 16.0
2012 05 05 02 09 50.5 +14 38 18 0.9311 0.1796 9.6 110.7 14.9
2012 05 06 02 04 18.3 +15 22 23 0.9651 0.2066 11.7 96.3 14.5
2012 05 07 02 00 43.9 +16 06 11 1.0001 0.2357 13.5 85.4 14.5
2012 05 08 01 58 35.5 +16 48 27 1.0349 0.2654 14.9 77.1 14.5
2012 05 09 01 57 28.9 +17 28 45 1.0686 0.2951 16.0 70.6 14.6
2012 05 10 01 57 07.1 +18 06 59 1.1011 0.3245 17.0 65.3 14.7
2012 05 11 01 57 18.3 +18 43 13 1.1323 0.3534 17.8 61.1 14.8
2012 05 12 01 57 54.0 +19 17 35 1.1621 0.3816 18.6 57.6 14.9
2012 05 13 01 58 48.2 +19 50 14 1.1908 0.4093 19.3 54.6 15.0
2012 05 14 01 59 56.5 +20 21 17 1.2182 0.4363 19.9 52.1 15.1
2012 05 15 02 01 15.6 +20 50 54 1.2446 0.4627 20.5 49.9 15.3
2012 05 16 02 02 43.2 +21 19 12 1.2699 0.4885 21.1 48.1 15.4
2012 05 17 02 04 17.3 +21 46 16 1.2943 0.5137 21.6 46.4 15.5
2012 05 18 02 05 56.6 +22 12 14 1.3178 0.5384 22.1 45.0 15.6
2012 05 19 02 07 39.8 +22 37 11 1.3403 0.5626 22.6 43.8 15.7
2012 05 20 02 09 26.1 +23 01 10 1.3621 0.5863 23.1 42.6 15.8
2012 05 21 02 11 14.9 +23 24 17 1.3832 0.6095 23.6 41.6 15.9
2012 05 22 02 13 05.5 +23 46 36 1.4034 0.6322 24.1 40.7 15.9
2012 05 23 02 14 57.4 +24 08 09 1.4230 0.6545 24.5 39.9 16.0


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Ephemeris
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  mag     

Dec. 4 17 52.74 -17 15.0 1.100 0.341 17 14.4

Dec. 11 19 2.71 -12 9.3 1.098 0.528 28 15.4


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3200 Phaethon was discovered in 1983 by NASA's IRAS satellite and promptly classified as an asteroid. What else could it be? It did not have a tail; its orbit intersected the main asteroid belt; and its colours strongly resembled that of other asteroids. Indeed, 3200 Phaethon resembles main belt asteroid Pallas so much, it might be a 5-kilometer chip off that 544 km block.
Researchers have looked carefully at the orbits of Geminid meteoroids and concluded that they were ejected from 3200 Phaethon when Phaethon was close to the sun - not when it was out in the asteroid belt breaking up with Pallas. The eccentric orbit of 3200 Phaethon brings it well inside the orbit of Mercury every 1.4 years. The rocky body thus receives a regular blast of solar heating that might boil jets of dust into the Geminid stream.

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The magnitude 14.8 asteroid 3200 Phaethon will pass 0.62 from the open cluster NGC 6505 in the constellation Serpens, at 8:00 UT, 6th December, 2010.

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The magnitude 14.5 asteroid 3200 Phaethon will pass 0.58 from the open cluster NGC 6507 in the constellation Sagittarius, at 13:00 UT, 4th December, 2010.

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Asteroid 3200 Phaethon sometimes acts like a comet, lighting up the earth's night sky with meteor showers. Sometimes it's like an asteroid, a hunk of rock floating in space.
Phaethon has baffled scientists for years, because it doesn't behave the way they expect. But University of Central Florida professor Humberto Campins may have uncovered a major clue - Phaethon's daddy.
Using telescopes and mathematical modelling, researchers looked at the chemical composition - the DNA fingerprint -- of Phaethon and compared it to the composition of the second-largest asteroid found in the main asteroid belt located between Mars and Jupiter. They found significant similarities between Phaethon and 2 Pallas.

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An asteroid that is the source of an annual meteor shower may owe its weird crumbliness to intense cooking by the sun.
Most meteor showers are thought to come from comets, whose icy surfaces vaporise easily during close encounters with the sun. Dust that is liberated in the process burns up in Earth's atmosphere, creating "shooting stars".
However, the debris stream responsible for the annual Geminid shower in December follows the orbit of a 5-kilometre-wide object called 3200 Phaethon, which appears to be an asteroid.

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PHAETHON1.gif

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