2015 TC25: Difference between revisions
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{{DISPLAYTITLE: {{mp|2015 TC|25}}}} |
{{DISPLAYTITLE: {{mp|2015 TC|25}}}} |
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'''{{mp|2015 TC|25}}''' is a [[near-Earth asteroid]], and at only 2 meters (6 ft) across, it is thought to be the smallest [[asteroid]] observed from [[telescopes]] on [[Earth]]. The asteroid is notable for reflecting about 60% of the light that hits it, making it one of the brightest near-earth asteroids ever seen |
'''{{mp|2015 TC|25}}''' is a [[near-Earth asteroid]], and at only 2 meters (6 ft) across, it is thought to be the smallest [[asteroid]] observed from [[telescopes]] on [[Earth]]. The asteroid is notable for reflecting about 60% of the light that hits it, making it one of the brightest near-earth asteroids ever seen.<ref name="Stolte">{{cite web|last1=Stolte|first1=Daniel|title=It's a Bird … It's a Plane … It's the Tiniest Asteroid!|url=https://uanews.arizona.edu/story/its-bird-its-plane-its-tiniest-asteroid|website=UA News|publisher=University of Arizona|accessdate=17 February 2017}}</ref> |
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Discovered by the [[Catalina Sky Survey]] on 12 October 2015, it was observed with several ground-based telescopes.<ref name="Reddy">{{cite web|last1=Reddy|first1=Vishnu|last2=Sanchez|first2=Juan A.|last3=Bottke|first3=William F.|last4=Thirouin|first4=Audrey|last5=Rivera-Valentin|first5=Edgard G.|last6=Kelley|first6=Michael S.|last7=Ryan|first7=William|last8=Cloutis|first8=Edward A.|last9=Tegler|first9=Stephen C.|last10=Ryan|first10=Eileen V.|last11=Taylor|first11=Patrick A.|last12=Richardson|first12=James E.|last13=Moskovitz|first13=Nicholas|last14=Le Corre|first14=Lucille|title=Physical Characterization of ~2-meter Diameter Near-Earth Asteroid 2015 TC25: A possible boulder from E-type Asteroid (44) Nysa|url=https://arxiv.org/abs/1612.00113|website=arXiv.org|publisher=Cornell University Library|accessdate=17 February 2017}}</ref> [[Radar]] observations were also made using the [[Arecibo Observatory]] as it passed 128,000 kilometers (approximately a third of the distance to the moon) from the Earth.<ref name="Stolte" /> Observations suggest its surface composition is similar to [[Aubrite]] meteorites, a rare class of high-[[Albedo|albedo]] [[Planetary differentiation|differentiated]] meteorites.<ref name="Reddy" /> |
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The albedo and radar [[polarization]] ratio suggest {{mp|2015 TC|25}} belongs to the [[E-type asteroid]]s, and comparison of its [[Asteroid spectral types|spectral]] and [[Celestial mechanics|dynamical]] properties suggest its parent body may be the 70 kilometer diameter E-type asteroid [[44 Nysa]].<ref name="Reddy" /> {{mp|2015 TC|25}} is also notable for its rather short [[rotation period]] of only about 2 minutes, which, combined with its low [[Surface gravity|surface gravity]] makes it very difficult for {{mp|2015 TC|25}} to retain a [[Regolith|regolith]] layer. It's surface therefore most likely resembles a bare rock.<ref name="Reddy" /> |
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== References == |
== References == |
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Revision as of 04:38, 17 February 2017
2015 TC25 is a near-Earth asteroid, and at only 2 meters (6 ft) across, it is thought to be the smallest asteroid observed from telescopes on Earth. The asteroid is notable for reflecting about 60% of the light that hits it, making it one of the brightest near-earth asteroids ever seen.[1]
Discovered by the Catalina Sky Survey on 12 October 2015, it was observed with several ground-based telescopes.[2] Radar observations were also made using the Arecibo Observatory as it passed 128,000 kilometers (approximately a third of the distance to the moon) from the Earth.[1] Observations suggest its surface composition is similar to Aubrite meteorites, a rare class of high-albedo differentiated meteorites.[2]
The albedo and radar polarization ratio suggest 2015 TC25 belongs to the E-type asteroids, and comparison of its spectral and dynamical properties suggest its parent body may be the 70 kilometer diameter E-type asteroid 44 Nysa.[2] 2015 TC25 is also notable for its rather short rotation period of only about 2 minutes, which, combined with its low surface gravity makes it very difficult for 2015 TC25 to retain a regolith layer. It's surface therefore most likely resembles a bare rock.[2]
References
- ^ a b Stolte, Daniel. "It's a Bird … It's a Plane … It's the Tiniest Asteroid!". UA News. University of Arizona. Retrieved 17 February 2017.
- ^ a b c d Reddy, Vishnu; Sanchez, Juan A.; Bottke, William F.; Thirouin, Audrey; Rivera-Valentin, Edgard G.; Kelley, Michael S.; Ryan, William; Cloutis, Edward A.; Tegler, Stephen C.; Ryan, Eileen V.; Taylor, Patrick A.; Richardson, James E.; Moskovitz, Nicholas; Le Corre, Lucille. "Physical Characterization of ~2-meter Diameter Near-Earth Asteroid 2015 TC25: A possible boulder from E-type Asteroid (44) Nysa". arXiv.org. Cornell University Library. Retrieved 17 February 2017.
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