2015 GT50

Trans-Neptunian object March 2019 yes #C2E0FF 2015 GT 50 Planet_nine-etnos_now-new2.png The orbits of 2015 GT 50 (bottom; orange) and other detached objects, along with the hypothetical Planet Nine's orbit (right; green) OSSOS Mauna Kea Obs. 13 April 2015 Detached object o5p060 JDT 2458000.5 824 days (2.26 yr) 20 February 2015 38.45 AU 631.89 AU 335.169 AU 0.885 6,140 years 8.779° 46.100° 129.236° 8.5 List of known trans-Neptunian objects https://www.johnstonsarchive.net/astro/tnoslist.html 2025-12-06 www.johnstonsarchive.net 75 km? 0.124? 2015 GT 50 is a trans-Neptunian object orbiting in the Kuiper belt of the outermost Solar System. It was first observed by the Outer Solar System Origins Survey using the Canada–France–Hawaii Telescope at Mauna Kea on 13 April 2015. Description It is one of a small number of detached objects with perihelion distances of 30 AU or more, and semi-major axes of 250 AU or more.http://minorplanetcenter.net/db_search/show_by_properties?perihelion_distance_min=30&semimajor_axis_min=250 IAU Minor Planet Center Such objects cannot reach such orbits without some perturbing object, which has led to the Planet Nine hypothesis, that a massive trans-Neptunian planet is the perturber. However 2015 GT 50 is an interesting outlier of these trans-Neptunian objects that make one of the lines of evidence for Planet Nine. Unlike the others, the shape of whose orbits (longitudes of perihelion) either cluster in anti-alignment with the modeled orbit of Planet Nine or cluster in alignment with it, 2015 GT 50's major axis is almost at a right angle to that of the putative planet. Konstantin Batygin of Caltech suggests that this is only a cosmetic disagreement with his and Mike Brown's predictions for the positions of these bodies. In fact, he notes that without having to change the putative orbit of Planet Nine, 2015 GT 50 falls into one of the predicted resonant orbits. This, he notes, may be a coincidence.Batygin Konstantin 2017-06-30 Status Update (Part 1) http://www.findplanetnine.com/2017/06/status-update-part-1.html https://web.archive.org/web/20170701173135/http://www.findplanetnine.com/2017/06/status-update-part-1.html 2017-07-01 findplanetnine.com This conclusion, however, is not unanimous, and others have instead suggested that the existence of a population of objects with orbital characteristics similar to those of 2015 GT 50 may be at odds with the Planet Nine hypothesis. 320px|thumb|left|Closeup of current position near perihelion, passing across the top side of this view left References Shankman C. Kavelaars J. J. Bannister M. T. Gladman B. J. Lawler S. M. et al OSSOS. VI. Striking Biases in the Detection of Large Semimajor Axis Trans-Neptunian Objects The Astronomical Journal 2017 154 2 8 10.3847/1538-3881/aa7aed 2017AJ....154...50S 1706.05348 10150/625487 3535702 free External links MPEC 2017-M25 : 2015 GT50 OSSOS survey by the Canada–France–Hawaii Telescope 3775255 # # Category:Minor planet object articles (unnumbered) 20150413 Category:Discoveries by OSSOS Category:Inner Oort cloud