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Press Release from Space Telescope
Science Institute,
Provided by Bob Eklund
NASA’s Hubble Space Telescope helped
an international team of astronomers find
that an unusual object in the asteroid belt
is, in fact, two asteroids orbiting each other
that have comet-like features. These include
a bright halo of material, called a coma, and
a long tail of dust.
Hubble was used to image the asteroid,
designated 300163 (2006 VW139), in
September 2016 just before the asteroid made
its closest approach to the Sun. Hubble’s crisp
images revealed that it was actually not one,
but two asteroids of almost the same mass
and size, orbiting each other at a distance
of 60 miles.
Asteroid 300163 (2006 VW139) was
discovered by Spacewatch in November 2006
and then the possible cometary activity was
seen in November 2011 by Pan-STARRS.
Both Spacewatch and Pan-STARRS are
asteroid survey projects of NASA’s Near
Earth Object Observations Program. After the
Pan-STARRS observations it was also given
a comet designation of 288P. This makes the
object the first known binary asteroid that is
also classified as a main-belt comet.
The more recent Hubble observations
revealed ongoing activity in the binary system.
“We detected strong indications for the
sublimation of water ice due to the increased
solar heating — similar to how the tail of
a comet is created,” explained team leader
Jessica Agarwal of the Max Planck Institute
for Solar System Research, Germany.
The combined features of the binary
Hey Guys. Is Your Good
Health a Perception or Reality?
(BPT) - When it comes to health,
perception is not always reality. This is
especially true when considering how men
care for themselves when faced with a health
condition. In fact, while most men would
say they are more focused on their health
than they have been in the past, physicians
report a different truth. This difference is
especially concerning when it comes to
treating chronic conditions, because failure
to follow treatment regimens may lead to
bigger health problems in the future.
Missed Appointments and Opportunities
According to research from the American
Academy of Family Physicians, which
surveyed its member physicians, one in five
doctors said up to half of their male patients
failed to fill a prescription. In addition, one
in three doctors said that up to half of their
male patients did not take a prescription
as directed. Four in ten reported that up to
half of their male patients failed to follow
up with a regular routine test when ordered
for their condition.
In addition, nearly a quarter of surveyed
doctors said up to half of their male patients
failed to show up for planned follow-up visits.
These missed opportunities come at a time
when chronic conditions among men continue
to rise. According to the National Ambulatory
Medical Survey, diagnoses of three common,
yet potentially severe, conditions all have
increased year over year. The data shows
that cases of high blood pressure (4 percent
increase), high cholesterol (5 percent) and
diabetes (2 percent) have all seen notable
increases.
“People may not take these conditions
seriously because they don’t have any
noticeable symptoms, and that’s a big
mistake,” says John Meigs, Jr., MD, president
of the AAFP. “High blood pressure and high
cholesterol have been called ‘silent killers’
for a reason. If they aren’t controlled, they
can lead to heart attack, stroke or kidney
disease. In addition to these complications,
uncontrolled diabetes also can cause blindness,
nerve damage and loss of limbs.
“So it’s vital that men see their doctors,
get preventive care and follow instructions
for any chronic diseases they may have.”
Finding Solutions for Ongoing Care
Fortunately, taking a more proactive
approach to health care is easier than most
men think. A visit to your family physician
is the first step toward taking charge of your
health and identifying any health issues. Your
family physician will help you learn about
any chronic conditions you might have and
how to treat them. For health information
that is easy to understand, visit familydoctor.
org. You’ll find a men’s guide to preventive
health care, and information about healthy
diets and weight control. Follow the advice
provided here, as well as your doctor’s
recommendations, and you’ll turn your goal
for good health from simple perception into
reality. •
Looking Up Seniors
Comet or Asteroid? Hubble Discovers
That a Unique Object Is a Binary
asteroid—wide separation, near-equal
component size, high eccentricity orbit, and
comet-like activity—also make it unique
among the few known binary asteroids that
have a wide separation. Understanding its
origin and evolution may provide new insights
into the early days of the solar system. Mainbelt
comets may help to answer how water
came to a bone-dry Earth billions of years ago.
The team estimates that 2006 VW139/288P
has existed as a binary system only for about
5,000 years. The most probable formation
scenario is a breakup due to fast rotation.
After that, the two fragments may have
been moved further apart by the effects of
ice sublimation, which would give a tiny
push to an asteroid in one direction as water
molecules are ejected in the other direction.
The fact that 2006 VW139/288P is so
different from all other known binary asteroids
raises some questions about how common
such systems are in the asteroid belt. “We
need more theoretical and observational
work, as well as more objects similar to this
object, to find an answer to this question,”
concluded Agarwal.
The research is presented in a paper, to be
published in the journal Nature this week.
The Hubble Space Telescope is a project
of international cooperation between NASA
and ESA (European Space Agency). NASA’s
Goddard Space Flight Center in Greenbelt,
Maryland, manages the telescope. The
Space Telescope Science Institute (STScI) in
Baltimore, Maryland, conducts Hubble science
operations. STScI is operated for NASA by
the Association of Universities for Research
in Astronomy, Inc., in Washington, D.C. •