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Post Info TOPIC: Asteroid 2015 ER61


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Comet C/2015 ER61 (PANSTARRS)
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On April 4, 2017, it was detected outbursting to magnitude 6.5. On April 19, 2017, it will reach its closest point to Earth of ~1.2 AU. At this point, it will be about apparent magnitude 8, and, assuming a size of 20 km, have an apparent size of 19 milliarcsecond. It will come to perihelion (closest approach to the Sun) on May 10, 2017.
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Comet C/2015 ER61 fragmentation event: some further data and some simple analysis

As you may have heard, comet C/2015 ER61 Panstarrs has recently experienced a nucleus splitting. We were among those who reported this event. Digging in our image archives, we have found evidence of that fragment in June 02 2017 images and could document the motion of the "b" component.
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Posts: 130179
Date:
Asteroid 2015 ER61
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Orbital elements:
2015 ER61                                           PHA, Earth MOID = 0.0140 AU
Epoch 2015 Mar. 19.0 TT = JDT 2457100.5                 MPC
M 359.06688              (2000.0)            P               Q
n   0.00115781     Peri.   86.65541     +0.70031952     +0.70864328
a  89.8207997      Node   228.19643     -0.69212183     +0.64464169
e   0.9933428      Incl.    6.61648     -0.17469955     +0.28681319
P 851              H   11.9           G   0.15

MPEC 2015 - F124



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