Τετάρτη, 29 Οκτωβρίου 2014


ο κομήτης C/2013 A1 Siding Spring αποχαιρετά τον πλανήτη Αρη.

Photo Credit : Jim Deligeorgopoulos



Μοναδική φωτογραφία αφου ο κομήτης θα μας ξαναπλησιασει σε εκατομμύρια χρόνια.
Φωτογραφία απο το παρατηρητηριο ASTROTEK.  Το πορτοκάλι λαμπερό αστέρι πάνω αριστερά είναι ο πλανήτης Αρης.Το νεφελώδες αντικείμενο που είναι ελαφρώς πανω και δεξιά απο τον κομητη ειναι το ngc 6401.




C/2013 A1 (Siding Spring) is an Oort cloud comet discovered on 3 January 2013 by Robert H. McNaught at Siding Spring Observatory using the 0.5-meter (20 in) Uppsala Southern Schmidt Telescope.[1][4] At the time of discovery it was 7.2 AU from the Sun and located in the constellation Lepus. Comet C/2013 A1 likely took millions of years to come from the Oort cloud. After leaving the planetary region of the Solar System, the post-perihelion orbital period (epoch 2050) is estimated to be roughly 1 million years.

C/2013 A1 passed the planet Mars very closely on 19 October 2014. After its discovery, there was thought to be a chance of a collision with Mars, but this possibility was excluded when the orbit was subsequently better determined.