CORONAL HOLE: Spewing a stream of high-speed solar wind, a dark gap in the sun's atmosphere is turning toward Earth. NASA's Solar Dynamics Observatory photographed the coronal hole during the early hours of June 27th:
Coronal holes are places where the sun's magnetic field opens up and allows solar wind to escape. A stream of solar wind flowing from this particular opening should reach Earth on July 1-2. High-latitude sky watchers should be alert for auroras on those dates. Magnetic storm alerts: text, voice.
SOURCE: http://spaceweather.com/
---------END UPDATE-------------------
HERE'S WHAT'S UP IN SPACE, SUN, EARTH...YOU KNOW...THAT SORT OF STUFF...
COMING ATTRACTION? An active sunspot on the farside of the sun is only days away from showing itself. During the late hours of June 25th, NASA's Solar Dynamics Observatory recorded an explosion which heralds the sunspot's approach:
The farside blast hurled a cloud of plasma over the sun's southeastern limb. Earth was not in the line of fire, but Mars might be. The Solar and Heliospheric Observatory saw a coronal mass ejection (movie) heading in the general direction of the Red Planet. The rover Curiosity, en route to Mars now, might detect something as the cloud passes by. A glancing blow to Mars itself is possible on June 29th or 30th.
2012 MY2 Asteroid 30 Jun 2012 East Side Earth Distance 0.0038 AU Sun Distance 1.016 AU
JUNE 24, 2012
2012 MY2 Asteroid 30 Jun 2012 East Side Earth Distance 0.0038 AU Sun Distance 1.016 AU
the idea girl says
this one's going to be 1.3 LD from earth, gravitational pull combined with other planetary alignments this month can cause ocean levels to rise…
this one just flew by...
Asteroid 2012 MF7 discovered. Flyby Jun 21 at 02:40 UT. Dist: 0.83 LD (0.81 LD from Earth surface). Size: 8-26 m. http://www.minorplanetcenter.net/db_search/show_object?object_id=2012+MF7&commit=Show
JUST FOUND THIS...DON'T KNOW IF I WAS SUPPOSED TO, BUT HERE IS A LIST OF NEAR-EARTH ASTEROIDS THAT ARE RATED BY NASA AS TARGETS FOR EXPLORATION VIA SPACECRAFT RENDEZVOUS...
Near-Earth Asteroid Delta-V for Spacecraft Rendezvous
Delta-V is computed following the approach described by Shoemaker and Helin (1978),
Earth-approaching asteroids as targets for exploration, NASA CP-2053, pp. 245-256.
Last update: Mon Jun 25 13:31:01 PDT 2012
Source for NEA orbits: Minor Planet Center
http://www.minorplanetcenter.org/iau/lists/Atens.html
http://www.minorplanetcenter.org/iau/lists/Apollos.html
http://www.minorplanetcenter.org/iau/lists/Amors.html
Calculations by Lance A. M. Benner
Jet Propulsion Laboratory, California Institute of Technology
http://echo.jpl.nasa.gov/~lance/delta_v/delta_v.rendezvous.html
N = 8963
For comparison, delta-v for transferring from low-Earth orbit to rendezvous
with the Moon and Mars:
Moon: 6.0 km/s
Mars: 6.3 km/s
DELTA-V (ASTEROID)/
PROVISIONAL DELTA-V DELTA-V FOR
RANK PERCENTILE ASTEROID NAME DESIGNATION (KM/S) THE MOON MARS H (mag) a (AU) e i (deg)
==== ========== ============= =========== ======= ======== ==== ======= ====== = =======
1 99.99 2006 RH120 3.820 0.637 0.606 29.5 1.033 0.024 0.6 RADAR
2 99.98 2007 UN12 3.823 0.637 0.607 28.7 1.054 0.060 0.2
3 99.97 2010 UE51 3.829 0.638 0.608 28.3 1.055 0.060 0.6
4 99.96 2009 BD 3.870 0.645 0.614 28.1 1.062 0.052 1.3
5 99.94 2010 VQ98 3.924 0.654 0.623 28.2 1.023 0.027 1.5
6 99.93 2008 HU4 3.927 0.654 0.623 28.2 1.093 0.073 1.3
7 99.92 2012 EC 3.953 0.659 0.627 23.4 1.153 0.138 0.9
8 99.91 2008 EA9 3.962 0.660 0.629 27.7 1.059 0.080 0.4
9 99.90 1991 VG 3.998 0.666 0.635 28.5 1.027 0.049 1.4
10 99.89 2008 UA202 4.029 0.672 0.640 29.4 1.033 0.068 0.3
THE LIST IS MASSIVE....
http://echo.jpl.nasa.gov/~lance/delta_v/delta_v.rendezvous.html
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