2015 RN35

Near-Earth asteroid March 2024 yes 2015 RN 35 #FFC2E0 2015rn35.dec17.40MHz.0p5hz.movie.10runs.v2.gif 2015 RN 35's radar echo, observed by the Goldstone Observatory in December 2022. Pan-STARRS 1 Haleakalā, United States 9 September 2015 2015 RN 35 NEO Apollo (JPL) 5 May 2025 (JD 2460800.5) 0 2719 days 9 September 2015 1.987 AU 0.962 AU 8 September 2024 (UTC) 1.4746 AU 0.3475 1.791 yr(654.028 days) 131.416 ° 1.7906 ° per day 0.2343 ° 148.005 ° 269.669 ° 0.00351 AU km LD unit 3.3734 AU 41 8 m11 0.31936 0.00008 h or 0.24889 0.000003 h 4, 6 A-type or Z-type9 23.24 (JPL) 23.9 0.2 (Beniyama et al.)11 2015 RN 35 is a small, unusually spectrally red asteroid estimated to be around 41 m ft in size. Its orbit crosses Earth's, and is therefore classified as an Apollo asteroid and a near-Earth object (NEO). It was discovered on 9 September 2015 by the Pan-STARRS survey at the Haleakalā Observatory in Hawaii, United States, during one of its close encounters with Earth. Discovery and observations 2015 RN 35 was discovered on 9 September 2015 by the Pan-STARRS 1 telescope as the asteroid passed within 0.1907 astronomical units (AU) from Earth.327 Further observations were conducted to establish and refine the asteroid's orbit. These observations extended to March 2016, and once again in March 2018327,337 2025, it has not yet been numbered or named by the Minor Planet Center. 2015 RN 35 passed within 0.0046 AU km on from Earth on 15 December 2022. This encounter permitted the Goldstone Observatory, alongside the Australia-based Canberra Deep Space Communication Complex and Australia Telescope Compact Array, to conduct radar imaging of the asteroid. Orbit left|thumb|A diagram of 2015 RN 35's orbit, with the orbits of the inner planets shown. Yellow lines are the axes of the ecliptic plane. 2015 RN 35 is classified as a near-Earth object (NEO) and an Apollo asteroid (as its orbit crosses the Earth's). It has an orbital period of around 1.791 Earth years. Its orbit is moderately elliptical, with an orbital eccentricity of 0.3475. It has a semi-major axis of 1.4746 AU, with its distance from the Sun varying from 0.962 AU at perihelion to 1.987 AU at aphelion. Its orbital inclination with respect to the ecliptic plane (the orbital plane of the Earth around the Sun) is very small, at 0.2343°. Physical characteristics The size of 2015 RN 35 has not been directly measured, but it can be estimated from its brightness (absolute magnitude) and how reflective its surface is (geometric albedo). Using an absolute magnitude value of 23.9 0.2 and assuming 2015 RN 35's geometric albedo is 0.28 0.10, 2015 RN 35's estimated diameter is 41 ± 8 m ft on.11 During the December 2022 close encounter, 2015 RN 35's lightcurve data was taken. Using the observed data, several teams of astronomers calculated its rotation period from fluctuations in the asteroid's observed brightness.4 Initial calculations gave a period of about 0.32 hour minute, with irregularities in its lightcurve possibly indicating chaotic rotation. Later analysis in a 2023 study led by Jin Beniyama revealed an additional, shorter 0.25 h min on long period in 2015 RN 35's lightcurve. The presence of both suggests precession, though which period corresponds to the rotation period and precession period remains unclear.4,6 Unusually, 2015 RN 35's visible spectrum suggests that it is strongly red. It is nearly as red as the visible spectrum of 269 Justitia, a similarly extremely red object located in the main asteroid belt. 2015 RN 35's spectrum also agrees well with that of rare A-type asteroids and Z-type asteroids, the latter classification having been recently proposed in a 2022 study led by Max Mahlke.9–12 Exploration 2015 RN 35 serves as a potential target for a future spacecraft mission due to its proximity and unusual spectral properties. For a launch window between 2030 and 2035, a mission would need a delta-v budget of 11.801 km/s.11–12 2015 RN 35 is on NASA's automated Near-Earth Object Human Space Flight Accessible Targets Study (NHATS) list of mission-accessible target asteroids. See also 203 Pompeja – Another very red main belt asteroid References MPEC 2015-R61 : 2015 RN35 https://www.minorplanetcenter.net/mpec/K15/K15R61.html Minor Planet Center Staff Minor Planet Electronic Circular Minor Planet Center 2015MPEC....R...61M 2015-R61 12 September 2015 23 March 2025 10 July 2024 https://web.archive.org/web/20240710184245/https://www.minorplanetcenter.net/mpec/K15/K15R61.html live 2023-02-18 last obs. JPL Small-Body Database Lookup: (2015 RN35) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2015%20RN35 Jet Propulsion Laboratory 22 March 2025 22 January 2025 https://web.archive.org/web/20250122110828/https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2015%20RN35 live 2015 RN35 https://www.minorplanetcenter.net/db_search/show_object?object_id=2015+RN35 https://web.archive.org/web/20250122051624/http://www.minorplanetcenter.net/db_search/show_object?object_id=2015%20RN35 22 January 2025 Minor Planet Center 22 March 2025 live (400 obs) Beniyama Jin Ohsawa Ryou Avdellidou Chrysa Sako Shigeyuki Takita Satoshi Ishiguro Masateru Sekiguchi Tomohiko Usui Fumihiko Kinoshita Shinichi W. Lee Kianhong Takumi Asami Ferrais Marin Jehin Emannuël Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN35 across a Wide Range of Phase Angles: Possible Mission-accessible A-type Asteroid December 2023 The Astronomical Journal 166 6 229 229 10.3847/1538-3881/ad0151 free 2023AJ....166..229B 2310.05740 Goldstone Radar Observations Planning: 2010 XC15, 2015 RN35, and 2014 HK129 https://echo.jpl.nasa.gov/asteroids/2010XC15/2010XC15.2022.goldstone.planning.html#Log Benner Lance A. M. Asteroid Radar Research 25 March 2023 Franco Lorenzo Marchini Alessandro Iozzi Marco Galli Gianni Montigiani Nico Mannucci Massimiliano Scarfi Giulio Coffano Alessandro Marinello Wladimiro Mattei Andrea Ruocco Nello Baj Giorgio Collaborative Asteroid Photometry From Uai: 2022 October–December April 2023 The Minor Planet Bulletin 50 2 173–176 2023MPBu...50..173F Colazo Milagros Fornari César Cianca Giuseppe Scotta Damián Morales Mario Melia Raúl Wilberger Aldo Suárez Néster Monteleone Bruno García Alberto Anzola Marcos Santos Francisco Mottino Aldo Colazo Carlos Asteroid Photometry and Lightcurve Analysis for Eight Asteroids July 2023 The Minor Planet Bulletin 50 2 235–238 2023MPBu...50..235C Petrov N. A. Vasil'ev A. A. Kuteeva G. A. Sokolov L. L. On the Trajectories of Asteroid Encounters with the Earth for 2015 RN35 and Apophis July 2018 Solar System Research 52 4 326–337 10.1134/S0038094618040032 2018SoSyR..52..326P M. Mahlke B. Carry P.-A. Mattei Asteroid taxonomy from cluster analysis of spectrometry and albedo Astronomy & Astrophysics September 2022 665 A26 32 free 10.1051/0004-6361/202243587 2203.11229 2022A&A...665A..26M 247597027 External links 2015RN35 2015RN35 2015 RN35 Astronomy Outer Space # Category:Minor planet object articles (unnumbered) Category:Minor planets discovered in 2015