2013 BS45 (also written 2013 BS45) is a horseshoe companion to the Earth like 3753 Cruithne.[6] Like Cruithne, it does not orbit the Earth in the normal sense and at times it is on the other side of the Sun, yet it still periodically comes nearer to the Earth in sort of halo orbit before again drifting away. While not a traditional natural satellite, it does not quite have normal heliocentric orbit either and these are sometimes called quasi-satellties or horseshoe orbits.
2013 BS45 was discovered by James V. Scotti on 20 January 2013, observing for the Spacewatch project from Kitt Peak (KPNO).[7][8] Its orbit is characterized by low eccentricity (0.084), low inclination (0.77º) and a semi-major axis of 0.993 AU;[8] it is the most Earth-like among those of asteroids moving in Earth-like orbits.[6] Upon discovery, it was classified as an Atenasteroid but also an Earth crosser by the Minor Planet Center. Its orbit is well determined; as of 26 August 2015, its orbit is based on 96 observations spanning a data-arc of 375 days.[2]2013 BS45 has an absolute magnitude of 25.9 which gives a characteristic diameter of 30 m.[5] Radar observations indicate that it may be a very rapid rotator with a period of just a few minutes.
Horseshoe companion to the Earth and orbital evolution
Recent calculations indicate that it follows a horseshoe orbit with respect to the Earth.[6] Its orbital evolution is highly chaotic and its orbit is difficult to predict beyond a few thousand years.[6] As for the available data, it had its closest encounter ever with Earth on 12 February 2013 at 0.013 AU, closer than in 1934, the previously closest approach at 0.014 AU. The next approach closer than 0.020 AU will take place on 2 September 2090 at 0.016 AU.[2] Its orbit matches the expected properties of that of an object in the Arjuna class.[9]
Origin
2013 BS45 may have originated within the Venus-Earth-Mars region; alternatively, it may have come from the main asteroid belt like other Near-Earth Objects, then transitioned to an Amor-class asteroid before entering Earth's co-orbital region.[6]
^ ab "2013 BS45". MPC (last obs: 2014-01-30.0). Retrieved 26 August 2015.
^de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (12 February 2015). "Geometric characterization of the Arjuna orbital domain". Astronomische Nachrichten. 336 (1): 5–22. arXiv:1410.4104. Bibcode:2015AN....336....5D. doi:10.1002/asna.201412133.
Further reading
A resonant family of dynamically cold small bodies in the near-Earth asteroid belt de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2013), Monthly Notices of the Royal Astronomical Society: Letters, Vol. 434, Issue 1, pp. L1-L5.
Geometric characterization of the Arjuna orbital domain de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2015), Astronomische Nachrichten, Vol. 336, Issue 1, pp. 5–22.
External links
2013 BS45 data at MPC
MPEC 2013-B72 : 2013 BS45 (Discovery MPEC)
2013 BS45 Goldstone Radar Observations Planning
2013 BS45 imaged by the Palomar Transient Factory survey
The “Horseshoe” Orbit of Near-Earth Object 2013 BS45 by D. R. Adamo
2013 BS45 at NeoDyS-2, Near Earth Objects—Dynamic Site
Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
March 04, 2023
2013, 2013, bs45, also, written, 2013, bs45, horseshoe, companion, earth, like, 3753, cruithne, like, cruithne, does, orbit, earth, normal, sense, times, other, side, still, periodically, comes, nearer, earth, sort, halo, orbit, before, again, drifting, away, . 2013 BS45 also written 2013 BS45 is a horseshoe companion to the Earth like 3753 Cruithne 6 Like Cruithne it does not orbit the Earth in the normal sense and at times it is on the other side of the Sun yet it still periodically comes nearer to the Earth in sort of halo orbit before again drifting away While not a traditional natural satellite it does not quite have normal heliocentric orbit either and these are sometimes called quasi satellties or horseshoe orbits 2013 BS45DiscoveryDiscovered byJames V Scotti Spacewatch Discovery date20 January 2013DesignationsMPC designation2013 BS45Minor planet categoryAtenNEO 1 2 Earth crosserOrbital characteristics 2 3 4 Epoch 13 January 2016 JD 2457400 5 Uncertainty parameter 0Observation arc375 days 1 03 yr Aphelion1 0758430 AU 160 94382 Gm Perihelion0 9093608 AU 136 03844 Gm Semi major axis0 9926019 AU 148 49113 Gm Eccentricity0 0838615Orbital period sidereal 0 99 yr 361 2 d Mean anomaly257 52229 Mean motion0 59m 47 93s dayInclination0 7726189 Longitude of ascending node83 40080 Argument of perihelion150 3038 Earth MOID0 0114221 AU 1 70872 Gm Jupiter MOID3 89526 AU 582 723 Gm Physical characteristicsDimensions20 40 m a 5 Absolute magnitude H 25 9 2 Contents 1 Discovery orbit and physical properties 2 Horseshoe companion to the Earth and orbital evolution 3 Origin 4 See also 5 Notes 6 References 7 External linksDiscovery orbit and physical properties Edit2013 BS45 was discovered by James V Scotti on 20 January 2013 observing for the Spacewatch project from Kitt Peak KPNO 7 8 Its orbit is characterized by low eccentricity 0 084 low inclination 0 77º and a semi major axis of 0 993 AU 8 it is the most Earth like among those of asteroids moving in Earth like orbits 6 Upon discovery it was classified as an Aten asteroid but also an Earth crosser by the Minor Planet Center Its orbit is well determined as of 26 August 2015 its orbit is based on 96 observations spanning a data arc of 375 days 2 2013 BS45 has an absolute magnitude of 25 9 which gives a characteristic diameter of 30 m 5 Radar observations indicate that it may be a very rapid rotator with a period of just a few minutes Horseshoe companion to the Earth and orbital evolution EditRecent calculations indicate that it follows a horseshoe orbit with respect to the Earth 6 Its orbital evolution is highly chaotic and its orbit is difficult to predict beyond a few thousand years 6 As for the available data it had its closest encounter ever with Earth on 12 February 2013 at 0 013 AU closer than in 1934 the previously closest approach at 0 014 AU The next approach closer than 0 020 AU will take place on 2 September 2090 at 0 016 AU 2 Its orbit matches the expected properties of that of an object in the Arjuna class 9 Origin Edit2013 BS45 may have originated within the Venus Earth Mars region alternatively it may have come from the main asteroid belt like other Near Earth Objects then transitioned to an Amor class asteroid before entering Earth s co orbital region 6 See also Edit3753 Cruithne 2001 GO2 2002 AA29 2003 YN107 2006 JY26 2009 SH2 2010 SO16 2012 FC71 Orbital resonanceNotes Edit This is assuming an albedo of 0 20 0 04 References Edit List Of Aten Minor Planets Minor Planet Center Retrieved 27 August 2015 a b c d e 2013 BS45 JPL Small Body Database Jet Propulsion Laboratory SPK ID 3625129 Retrieved 3 April 2016 last obs 2014 01 30 2013 BS45 Summary AstDys 2 Asteroids Dynamic Site Retrieved 11 May 2013 2013 BS45 Summary NEODyS 2 Near Earth Objects Dynamic Site Retrieved 11 May 2013 a b Absolute magnitude conversion table H NASA 27 August 2015 Archived from the original on 2 March 2001 a b c d e de la Fuente Marcos Carlos de la Fuente Marcos Raul July 2013 A resonant family of dynamically cold small bodies in the near Earth asteroid belt Monthly Notices of the Royal Astronomical Society Letters 434 1 L1 L5 arXiv 1305 2825 Bibcode 2013MNRAS 434L 1D doi 10 1093 mnrasl slt062 Discovery MPEC a b 2013 BS45 MPC last obs 2014 01 30 0 Retrieved 26 August 2015 de la Fuente Marcos Carlos de la Fuente Marcos Raul 12 February 2015 Geometric characterization of the Arjuna orbital domain Astronomische Nachrichten 336 1 5 22 arXiv 1410 4104 Bibcode 2015AN 336 5D doi 10 1002 asna 201412133 Further readingA resonant family of dynamically cold small bodies in the near Earth asteroid belt de la Fuente Marcos Carlos de la Fuente Marcos Raul 2013 Monthly Notices of the Royal Astronomical Society Letters Vol 434 Issue 1 pp L1 L5 Geometric characterization of the Arjuna orbital domain de la Fuente Marcos Carlos de la Fuente Marcos Raul 2015 Astronomische Nachrichten Vol 336 Issue 1 pp 5 22 External links Edit2013 BS45 data at MPC MPEC 2013 B72 2013 BS45 Discovery MPEC 2013 BS45 Goldstone Radar Observations Planning 2013 BS45 imaged by the Palomar Transient Factory survey The Horseshoe Orbit of Near Earth Object 2013 BS45 by D R Adamo 2013 BS45 at NeoDyS 2 Near Earth Objects Dynamic Site Ephemerides Observation prediction Orbital info MOID Proper elements Observational info Close approaches Physical info Orbit animation 2013 BS45 at ESA space situational awareness Ephemerides Observations Orbit Physical properties Summary 2013 BS45 at the JPL Small Body Database Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 2013 BS45 amp oldid 1135200413, wikipedia, wiki, book, books, library,
