NASA posted a video on their website Buzzroom, bringing attention to a recently discovered comet in our solar system. The comet was discovered by Russian astronomer Leonid Elenin in December last year. Comet Elenin, as it is called, is of particular interest to NASA because of the close proximity to Earth that its orbit will reach during its turn around the sun on its way back out through the solar system later this year.
Most orbits of planets are not circles; they are ellipses. The elongated ends of elliptical orbits are called aphelions and perihelions; the aphelion being the end farthest away from the stationary object being orbited, and perihelion being the end closest to the stationary object. In Elenin's case, its trip around our sun represents the comet's perihelion.
So little is known about this comet because of its relatively recent-discovery status, therefore, information regarding its size, mass, and orbit still vary widely or are missing altogether due to a lack of observational data. Still, astrophysicists have been plugging away at Elenin ever sine it was discovered last year. Article extract source.
NASA’s put a video up in their Buzzroom about Elenin, but it is not there anymore (however here it is below).
In the beginning of the video, Earth is moving at approximately 30.3km/s. It's eccentricity is 0.019, inclination 0.0019, it's periapsis is 334, ascending node 128, and anomaly at epoch is 12.1. It's orbit is obviously 1.00 years.
Approximately 2 hours after the passing, it's orbital properties change immensely. The eccentricity is then 0.75, the inclination is 107, the argument is 96.4, the longitude of the ascending node is 165, and the mean anomaly at epoch is -5.17. Indeed, the eccentricity is increased to a point where it is only in the habitable range of the star for half of its orbit. Additionally, the orbital period of the planet nearly doubles.
As for the clockwise rotation of the simulation, the body is approaching from almost directly above us, its inclination is about