2015 TC₂₅

2015 TC₂₅
Discovery
Discovered by	Catalina Sky Survey
Discovery date	12 October 2015
Designations
MPC designation	2015 TC25
Minor planet category	Apollo
Orbital characteristics
	EpochJD2457607.5 (2016 August 7)
Aphelion	1.1504AU
Perihelion	0.9081 AU
Semi-major axis	1.0292 AU
Eccentricity	0.1177
Orbital period (sidereal)	1.04 yr
Mean anomaly	214.2377°
Mean motion	0° 56m38.04s/ day
Inclination	3.6383°
Longitude of ascending node	19.6544
Argument of perihelion	80.5784°
Physical characteristics
Mean radius	2 meters (6.6 ft)
Synodic rotation period	0.03715 h (2.229 min)
Spectral type	E
Absolute magnitude(H)	29.5

2015 TC₂₅is anear-Earth asteroid,and at only 6 feet (1.8 meters) across and absolute magnitude 29.34 mag, it is thought to be the third smallestasteroidobserved over multiple years, after2021 GM1with absolute magnitude 30.4 and2006 RH120with absolute magnitude 29.5. 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.^[3]

Discovered by theCatalina Sky Surveyon 12 October 2015, it was observed with several ground-based telescopes.^[2]Radarobservations were also made using theArecibo Observatoryas it passed 128,000 kilometers (80,000 miles) from the Earth.^[3]Observations suggest its surface composition is similar toAubritemeteorites, a rare class of high-albedo differentiatedmeteorites.^[2]

The albedo and radarpolarizationratio suggest2015 TC₂₅belongs to theE-type asteroids,and comparison of itsspectralanddynamicalproperties suggest it may have broke off of the 70-kilometer diameter E-type asteroid44 Nysa.^[2]2015 TC₂₅is also notable for its rather shortrotation periodof only about 2 minutes, which, combined with its lowsurface gravitymakes it very difficult for2015 TC₂₅to retain aregolithlayer. Its surface therefore most likely resembles a bare rock.^[2]

References

^^a ^b"JPL Small-Body Database Browser: (2015 TC25)"(2017-04-25 last obs).Retrieved11 June2019.
^^a ^b ^c ^d ^e ^fReddy, 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 (2016)."PHYSICAL CHARACTERIZATION OF ~2 m DIAMETER NEAR-EARTH ASTEROID 2015 TC25: A POSSIBLE BOULDER FROM E-TYPE ASTEROID (44) NYSA".The Astronomical Journal.152(6): 162.arXiv:1612.00113.Bibcode:2016AJ....152..162R.doi:10.3847/0004-6256/152/6/162.S2CID 58907935.
^^a ^bStolte, Daniel (29 November 2016)."It's a Bird… It's a Plane… It's the Tiniest Asteroid!".UA News.University of Arizona.Retrieved17 February2017.

External links

2015 TC25atNeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides·Observation prediction·Orbital info·MOID·Proper elements·Observational info·Close approaches·Physical info·Orbit animation
2015 TC25atESA–space situational awareness
- Ephemerides·Observations·Orbit·Physical properties·Summary
2015 TC25at theJPL Small-Body Database
- Close approach·Discovery·Ephemeris·Orbit diagram·Orbital elements·Physical parameters

[jpldata-1] "JPL Small-Body Database Browser: (2015 TC25)"(2017-04-25 last obs).Retrieved11 June2019.

[Reddy-2] 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 (2016)."PHYSICAL CHARACTERIZATION OF ~2 m DIAMETER NEAR-EARTH ASTEROID 2015 TC25: A POSSIBLE BOULDER FROM E-TYPE ASTEROID (44) NYSA".The Astronomical Journal.152(6): 162.arXiv:1612.00113.Bibcode:2016AJ....152..162R.doi:10.3847/0004-6256/152/6/162.S2CID 58907935.

[Stolte-3] Stolte, Daniel (29 November 2016)."It's a Bird… It's a Plane… It's the Tiniest Asteroid!".UA News.University of Arizona.Retrieved17 February2017.

[1]

[2]

[3]