On the morning of November 10, 2004,
the Moon will hide Venus behind it for about an hour or so. The Moon will come
directly between us and planet Venus. This event, called occultation in
technical jargon, is observable from almost all over India. However, those
in the eastern part of the country are better placed to see the event.
They will see the event earlier and it well placed above the horizon. Whereas,
are most likely to miss the disappearance of the planet. Check the table
below gives the time (in IST) of disappearances and reappearances for the
four metros and Pune city.
|Station||Venus disappears||Altitude in deg.||Venus reappears||Altitude in deg.|
|Altitude is the angle above the horizon|
The fast forward or what will happen on the morning of Nov. 10
This morning Jupiter will rise about
the eastern horizon by about 3:54 a.m. And 18 minutes later we can see
the Moon rising. Venus follows it four minutes later. As they climb above
the horizon we will see the distance between the bright limb of the Moon
and Venus closing up.
In just about 25 minutes Venus will
almost be touching the the bright limb of the Moon and after that Venus
will slowly disappear behind the Moon. It will take the Moon about 25 seconds
to completely cover Venus.
Above the bright lunar crescent we will
be able to make out the full disk of the Moon. On this part of the Moon
the Sun as already set but we can see, thought faintly, because it is now
being illuminated by the reflected light from the Earth.
Nothing much happens for some time now.
But soon two bright stars appear below the Moon.The right one is Spica
(Chitra) and Arcturus (Swati) to left (or north). Mars would rise about
40 minutes later.
Now the the sky will also starts becoming
brighter. About an hour later after it disappeared behind the Moon,
Venus can be seen coming out from behind the darker limb of the Moon. It
will take another half a minute for the Moon and Venus to be completely
separate from each other. And the distance between the planet and the satellite
continues to increases steadily.
The Sun would rise about 50 minutes
after the reappearance of Venus. By then the sky would be very bright for
one to see stars or planets. However, with the reference of the limb of
the Moon one can continue to see Venus all through the day. Just find the
Moon and see a bit west of it and see if you can spot the Venus.
Use of binocular or telescope will be
most useful in observing the event. Through a small telescope one can even
see phase of the Venus, which would look like the Moon four days before
or after its full moon phase.
It is not a not a rare event
though. The Moon does occults planets every now and then. On May 29, 2003
India witnessed similar occultation of Venus by the Moon. This event was
a day time event, that is the disappearing and reappearing act took place
when the Sun was above the horizon.
The best event that was widely observed
from Indian was double occultation of Jupiter and Venus. It took place
on April 23, 1998. The event took place around 1:30 p.m. Prior
to this on August 18, 567 AD double occultation of Venus and Jupiter was
visible from the Indian Ocean.
(This material can be freely used, it is expected that the source be acknowledged.
Credit : Arvind Paranjpye, Inter-University Centre for
Astronomy and Astrophysics, Pune.)
The image shows where Venus makes contact with Lunar limb
A same as above but has some features of on the Moon marked
This is how the planets and stars are placed
You may annotate this image in your local language for
publicity or local Public Outreach activity
please annotate the image appropriately.
Gibbous phase of Venus
Venus and Moon at the disappearance
Acknowledgements - Images of the Moon are from Occult programme by D. Herald, Hearaldd@canberra.dialix.oz.auand that of east sky is and limb profile are from SkyMap Pro (www.skymap.com) by C A Marriott.
Occultation of Venus and Jupiter by
Moon (Apr 23,1998)
Photographs by Suhas Gurjar, President, Jyotirvididya Parisanstha,(an associaiton of amateur astronomers) Pune
Thanks for this; it looks good. I'm asking Rob Robinson to put a link to it on the IOTA Web page. The reappearance will be a spectacular naked-eye event in India. We get the same occultation here in the USA, but in daylight at fairly low altitude. We have a much better event with Venus the next month, on Dec. 7, before sunrise like your event on Nov. 10.
International Occultation Timing Association