Mysterious Interstellar Object Is Approaching Earths Solar System
An amateur astronomer has reportedly discovered an interstellar object which has come from outside our Solar System.
If it is found to indeed be from outside Earths Solar System, it would be only the second such object, after the 2017 discovery of the elongated object known as Oumuamua.
According to the Minor Planet Center (MPC) at Harvard University, the object appears to have a hyperbolic orbit, suggesting it originated in a different planetary system.
European Southern Observatory
Hyperbolic orbit means the object orbits in a shape that is far from a perfect circle. A perfectly circular orbit would have an eccentricity of zero, most orbits of planets, asteroids and comets have an eccentricity between zero and one. This newly discovered object has an eccentricity of 3.2, according to BBC News.
The interstellar object was first spotted by amateur stargazer Gennady Borisov on August 30, at the Crimean Astrophysical Observatory in Bakhchysarai. When they spotted it, the object was roughly three astronomical units (about 450 million km) away from the sun.
According to the MPC:
This object was reported as a comet candidate by G. Borisov (L51) on Aug. 30 UTC. After posting on the NEOCP/PCCP, confirmation of the cometary nature was provided by numerous observers.
Based on the available observations, the orbit solution for this object has converged to the hyperbolic elements shown below, which would indicate an interstellar origin. A number of other orbit computers have reached similar conclusions
— Tony Dunn (@tony873004) September 11, 2019
Unlike Oumuamua, which was initially classified as a comet but later reclassified as it lacked characteristic comet qualities, the new object bears a clearly visible tail and coma (a fuzzy envelope around the nucleus of the comet), which are telltale signs.
According to observations, the new object is very bright and around 20km wide.
The MPC asked astronomers to make follow-up observations, saying an unexpected fading or disintegration should be observable for at least a year.
— Michele Bannister (@astrokiwi) September 11, 2019
Astrophysicist Karl Battams, from the Naval Research Laboratory in Washington DC, tweeted:
It has a name, and is – as such – now official. Comet C/2019 Q4 (Borisov) *appears* to be an interstellar comet! However, the observing arc is still short and the crucial part of the orbit info (eccentricity) still fuzzy. More obs needed to clear this up.
It has a name, and is – as such – now official. Comet C/2019 Q4 (Borisov) *appears* to be aRead More – Source