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4486 Mithra

January 31, 2023

4486 Mithra (prov. designation: 1987 SB), is an eccentric asteroid and suspected contact-binary, classified as near-Earth object and potentially hazardous asteroid, approximately 2 kilometers in diameter. It belongs to the Apollo group of asteroids and is a relatively slow rotator.

4486 Mithra
Discovery [1]
Discovered by
Discovery siteRozhen Obs. – Smolyan
Discovery date22 September 1987
Designations
(4486) Mithra
Pronunciation/ˈmɪθrə/[4]
Named after
Mithra
(proto-Indo-Iranian religion)[2]
  • 1987 SB
  • 1974 DN1
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc29.04 yr (10,607 days)
Aphelion3.6582 AU
Perihelion0.7417 AU
2.2000 AU
Eccentricity0.6629
3.26 yr (1,192 days)
91.928°
0° 18m 7.2s / day
Inclination3.0395°
82.240°
168.87°
Earth MOID0.0463 AU (18 LD)
Physical characteristics
Mean diameter
  • 1.849±0.022 km[5][6]
  • 2.25 km (calculated)[7]
S [7]

The asteroid was discovered on 22 September 1987, by Belgian astronomer Eric Elst and Bulgarian astronomer Vladimir Shkodrov at Rozhen Observatory, in the Smolyan Province of Bulgaria.[3] It was named after the Indo-Iranian divinity Mithra.[2]

Orbit and classification

Mithra orbits the Sun at a distance of 0.7–3.7 AU once every 3 years and 3 months (1,192 days). Its orbit has an eccentricity of 0.66 and an inclination of 3° with respect to the ecliptic.[1] In 1974, Mithra was first identified as 1974 DN1 at Crimea–Nauchnij. The body's observation arc begins 8 months prior to its official discovery observation, with a precovery taken at the Japanese Kiso Observatory in January 1987.[3]

Close approaches

As a potentially hazardous asteroid, it has a low minimum orbit intersection distance with Earth of 0.0462 AU (6,910,000 km; 18.0 LD).[1] On 14 August 2000, it passed 0.0465 AU (6,960,000 km; 18.1 LD) from Earth.[1]

Earth Approach on 11 April 2023[1]
Date JPL Horizons
nominal geocentric
distance (AU) 		uncertainty
region
(3-sigma)
2023-Apr-11 16:49 0.16267 AU (24.335 million km)[1] ±134 km[11]
Venus Approach on 4 November 2150[1]
Date JPL Horizons
nominal geocentric
distance (AU) 		uncertainty
region
(3-sigma)
2150-Nov-04 17:27 ± 00:44 0.01382 AU (2.067 million km)[1] ±1625 km[12]

Physical characteristics

Rotation period and shape

Radar imaging using a delay-Doppler technique at the Arecibo and Goldstone observatories rendered a rotation period of 67.5±6 hours.[8] Based on the radar analysis, Mithra is also a strong candidate for a contact binary, which is composed of two distinct lobes in mutual contact, held together by their weak gravitational attraction. They typically show a bifurcated, dumbbell-like shape (also see 4769 Castalia).[8][13] A large number of near-Earth objects are believed to be contact-binaries.[14]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Mithra measures 1.85 kilometers in diameter and its surface has a high albedo of 0.297, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 2.25 kilometer with an absolute magnitude of 15.6.[5][6][7]

Naming

This minor planet was named after Mithra (also see Mitra), deity in the proto-Indo-Iranian religion. The mystery religion of Mithraism was practiced in the Roman Empire between the 1st and 4th century. Considered to be a rival of early Christianity, both religions shared similar characteristics such as elevation and the ritual of baptism. In the Hellenistic world, Mithra was conflated with Apollo. The asteroid 1862 Apollo is the namesake of this asteroid's orbital group.[2] The approved naming citation was published by the Minor Planet Center on 5 September 1990 (M.P.C. 16885).[15]

References

  1. ^ a b c d e f g h i j k "JPL Small-Body Database Browser: 4486 Mithra (1987 SB)". Jet Propulsion Laboratory. Retrieved 4 July 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(4486) Mithra". Dictionary of Minor Planet Names – (4486) Mithra. Springer Berlin Heidelberg. p. 386. doi:10.1007/978-3-540-29925-7_4429. ISBN 978-3-540-00238-3.
  3. ^ a b c "4486 Mithra (1987 SB)". Minor Planet Center. Retrieved 10 August 2016.
  4. ^ "Mithras, Mithra". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  5. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  6. ^ a b c Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; et al. (December 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results". The Astrophysical Journal. 743 (2): 17. arXiv:1109.6400. Bibcode:2011ApJ...743..156M. doi:10.1088/0004-637X/743/2/156.
  7. ^ a b c d e "LCDB Data for (4486) Mithra". Asteroid Lightcurve Database (LCDB). Retrieved 10 August 2016.
  8. ^ a b c Brozovic, Marina; Benner, Lance A. M.; Magri, Christopher; Ostro, Steven J.; Scheeres, Daniel J.; Giorgini, Jon D.; et al. (July 2010). "Radar observations and a physical model of contact binary Asteroid 4486 Mithra" (PDF). Icarus. 208 (1): 207–220. Bibcode:2010Icar..208..207B. doi:10.1016/j.icarus.2010.01.035.
  9. ^ Ostro, S. J.; Hudson, R. S.; Benner, L. A. M.; Nolan, M. C.; Margot, J.-L.; Giorgini, J. D.; et al. (October 2000). "Radar Observations of Asteroid 4486 Mithra". American Astronomical Society. 32: 1003. Bibcode:2000DPS....32.0807O.
  10. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 – Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007.
  11. ^ "Horizons Batch for 2023-04-11 Close Approach". JPL Horizons. from the original on 25 October 2022. Retrieved 25 October 2022. RNG_3sigma = uncertainty range in km. (JPL#233/Soln.date: 2022-Sep-20 generates RNG_3sigma = 134 km)
  12. ^ "Horizons Batch for 2150-11-04 Venus Close Approach". JPL Horizons. from the original on 26 October 2022. Retrieved 26 October 2022. RNG_3sigma = uncertainty range in km. (JPL#233/Soln.date: 2022-Sep-20 generates RNG_3sigma = 1625 km)
  13. ^ Lance A. M. Benner (18 November 2013). . NASA/JPL Asteroid Radar Research. Archived from the original on 8 June 2004. Retrieved 1 March 2014.
  14. ^ Michael Busch (12 March 2012). "Near-Earth Asteroids and Radar Speckle Tracking" (PDF). Retrieved 10 August 2016.
  15. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 August 2016.

External links

  • (4486) Mithra at NeoDys, Near Earth Objects – Dynamic Site
  • Radar observations and a physical model of contact binary Asteroid 4486 Mithra – Science Direct
  • 3D Model Rotating image of the asteroid
  • Asteroid Lightcurve Database (LCDB), query form (info 16 December 2017 at the Wayback Machine)
  • Dictionary of Minor Planet Names, Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • 4486 Mithra at NeoDyS-2, Near Earth Objects—Dynamic Site
    • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
  • 4486 Mithra at ESA–space situational awareness
    • Ephemerides · Observations · Orbit · Physical properties · Summary
  • 4486 Mithra at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

January 31, 2023
4486, mithra, prov, designation, 1987, eccentric, asteroid, suspected, contact, binary, classified, near, earth, object, potentially, hazardous, asteroid, approximately, kilometers, diameter, belongs, apollo, group, asteroids, relatively, slow, rotator, discov. 4486 Mithra prov designation 1987 SB is an eccentric asteroid and suspected contact binary classified as near Earth object and potentially hazardous asteroid approximately 2 kilometers in diameter It belongs to the Apollo group of asteroids and is a relatively slow rotator 4486 MithraDiscovery 1 Discovered byE W ElstV G ShkodrovDiscovery siteRozhen Obs SmolyanDiscovery date22 September 1987DesignationsMPC designation 4486 MithraPronunciation ˈ m ɪ 8 r e 4 Named afterMithra proto Indo Iranian religion 2 Alternative designations1987 SB1974 DN1Minor planet categoryNEOApolloPHA 1 3 Orbital characteristics 1 Epoch 4 September 2017 JD 2458000 5 Uncertainty parameter 0Observation arc29 04 yr 10 607 days Aphelion3 6582 AUPerihelion0 7417 AUSemi major axis2 2000 AUEccentricity0 6629Orbital period sidereal 3 26 yr 1 192 days Mean anomaly91 928 Mean motion0 18m 7 2s dayInclination3 0395 Longitude of ascending node82 240 Argument of perihelion168 87 Earth MOID0 0463 AU 18 LD Physical characteristicsMean diameter1 849 0 022 km 5 6 2 25 km calculated 7 Synodic rotation period67 5 6 h 8 100 h 9 Geometric albedo0 20 assumed 7 0 297 0 056 5 6 Spectral typeS 7 Absolute magnitude H 15 6 1 5 7 15 68 0 31 10 The asteroid was discovered on 22 September 1987 by Belgian astronomer Eric Elst and Bulgarian astronomer Vladimir Shkodrov at Rozhen Observatory in the Smolyan Province of Bulgaria 3 It was named after the Indo Iranian divinity Mithra 2 Contents 1 Orbit and classification 1 1 Close approaches 2 Physical characteristics 2 1 Rotation period and shape 2 2 Diameter and albedo 3 Naming 4 References 5 External linksOrbit and classification EditMithra orbits the Sun at a distance of 0 7 3 7 AU once every 3 years and 3 months 1 192 days Its orbit has an eccentricity of 0 66 and an inclination of 3 with respect to the ecliptic 1 In 1974 Mithra was first identified as 1974 DN1 at Crimea Nauchnij The body s observation arc begins 8 months prior to its official discovery observation with a precovery taken at the Japanese Kiso Observatory in January 1987 3 Close approaches Edit As a potentially hazardous asteroid it has a low minimum orbit intersection distance with Earth of 0 0462 AU 6 910 000 km 18 0 LD 1 On 14 August 2000 it passed 0 0465 AU 6 960 000 km 18 1 LD from Earth 1 Earth Approach on 11 April 2023 1 Date JPL Horizonsnominal geocentricdistance AU uncertaintyregion 3 sigma 2023 Apr 11 16 49 0 16267 AU 24 335 million km 1 134 km 11 Venus Approach on 4 November 2150 1 Date JPL Horizonsnominal geocentricdistance AU uncertaintyregion 3 sigma 2150 Nov 04 17 27 00 44 0 01382 AU 2 067 million km 1 1625 km 12 Physical characteristics EditRotation period and shape Edit Radar imaging using a delay Doppler technique at the Arecibo and Goldstone observatories rendered a rotation period of 67 5 6 hours 8 Based on the radar analysis Mithra is also a strong candidate for a contact binary which is composed of two distinct lobes in mutual contact held together by their weak gravitational attraction They typically show a bifurcated dumbbell like shape also see 4769 Castalia 8 13 A large number of near Earth objects are believed to be contact binaries 14 Diameter and albedo Edit According to the survey carried out by the NEOWISE mission of NASA s Wide field Infrared Survey Explorer Mithra measures 1 85 kilometers in diameter and its surface has a high albedo of 0 297 while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0 20 and calculates a diameter of 2 25 kilometer with an absolute magnitude of 15 6 5 6 7 Naming EditThis minor planet was named after Mithra also see Mitra deity in the proto Indo Iranian religion The mystery religion of Mithraism was practiced in the Roman Empire between the 1st and 4th century Considered to be a rival of early Christianity both religions shared similar characteristics such as elevation and the ritual of baptism In the Hellenistic world Mithra was conflated with Apollo The asteroid 1862 Apollo is the namesake of this asteroid s orbital group 2 The approved naming citation was published by the Minor Planet Center on 5 September 1990 M P C 16885 15 References Edit a b c d e f g h i j k JPL Small Body Database Browser 4486 Mithra 1987 SB Jet Propulsion Laboratory Retrieved 4 July 2017 a b c Schmadel Lutz D 2007 4486 Mithra Dictionary of Minor Planet Names 4486 Mithra Springer Berlin Heidelberg p 386 doi 10 1007 978 3 540 29925 7 4429 ISBN 978 3 540 00238 3 a b c 4486 Mithra 1987 SB Minor Planet Center Retrieved 10 August 2016 Mithras Mithra Oxford English Dictionary Online ed Oxford University Press Subscription or participating institution membership required a b c d Mainzer A Grav T Masiero J Hand E Bauer J Tholen D et al November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids Preliminary Results The Astrophysical Journal 741 2 25 arXiv 1109 6407 Bibcode 2011ApJ 741 90M doi 10 1088 0004 637X 741 2 90 a b c Mainzer A Grav T Bauer J Masiero J McMillan R S Cutri R M et al December 2011 NEOWISE Observations of Near Earth Objects Preliminary Results The Astrophysical Journal 743 2 17 arXiv 1109 6400 Bibcode 2011ApJ 743 156M doi 10 1088 0004 637X 743 2 156 a b c d e LCDB Data for 4486 Mithra Asteroid Lightcurve Database LCDB Retrieved 10 August 2016 a b c Brozovic Marina Benner Lance A M Magri Christopher Ostro Steven J Scheeres Daniel J Giorgini Jon D et al July 2010 Radar observations and a physical model of contact binary Asteroid 4486 Mithra PDF Icarus 208 1 207 220 Bibcode 2010Icar 208 207B doi 10 1016 j icarus 2010 01 035 Ostro S J Hudson R S Benner L A M Nolan M C Margot J L Giorgini J D et al October 2000 Radar Observations of Asteroid 4486 Mithra American Astronomical Society 32 1003 Bibcode 2000DPS 32 0807O Veres Peter Jedicke Robert Fitzsimmons Alan Denneau Larry Granvik Mikael Bolin Bryce et al November 2015 Absolute magnitudes and slope parameters for 250 000 asteroids observed by Pan STARRS PS1 Preliminary results Icarus 261 34 47 arXiv 1506 00762 Bibcode 2015Icar 261 34V doi 10 1016 j icarus 2015 08 007 Horizons Batch for 2023 04 11 Close Approach JPL Horizons Archived from the original on 25 October 2022 Retrieved 25 October 2022 RNG 3sigma uncertainty range in km JPL 233 Soln date 2022 Sep 20 generates RNG 3sigma 134 km Horizons Batch for 2150 11 04 Venus Close Approach JPL Horizons Archived from the original on 26 October 2022 Retrieved 26 October 2022 RNG 3sigma uncertainty range in km JPL 233 Soln date 2022 Sep 20 generates RNG 3sigma 1625 km Lance A M Benner 18 November 2013 Binary and Ternary near Earth Asteroids detected by radar NASA JPL Asteroid Radar Research Archived from the original on 8 June 2004 Retrieved 1 March 2014 Michael Busch 12 March 2012 Near Earth Asteroids and Radar Speckle Tracking PDF Retrieved 10 August 2016 MPC MPO MPS Archive Minor Planet Center Retrieved 10 August 2016 External links Edit 4486 Mithra at NeoDys Near Earth Objects Dynamic Site Radar observations and a physical model of contact binary Asteroid 4486 Mithra Science Direct 3D Model Rotating image of the asteroid Asteroid Lightcurve Database LCDB query form info Archived 16 December 2017 at the Wayback Machine Dictionary of Minor Planet Names Google books Asteroids and comets rotation curves CdR Observatoire de Geneve Raoul Behrend 4486 Mithra at NeoDyS 2 Near Earth Objects Dynamic Site Ephemerides Observation prediction Orbital info MOID Proper elements Observational info Close approaches Physical info Orbit animation 4486 Mithra at ESA space situational awareness Ephemerides Observations Orbit Physical properties Summary 4486 Mithra 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 4486 Mithra amp oldid 1126711113, wikipedia, wiki, book, books, library,

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