( 21088) Chelyabinsk

(1992 BL2 )

Discovery Circumstances:

E. W. Elst - European Southern Observatory, La Silla

30 Jan 1992

(1)

Orbital Type:

AM

(*)

Taxonomic Type:

S;Q

( 2)( 3)( 4)( 5)

Albedo:

0.179

( 6)( 7)( 8)

Diameter:(km)

4.23 km

( 9)(10)

H:(mag)

14.350

(11)(12)

G:

0.24

(13)

U-B:(mag)

-

-

B-V:(mag)

0.94

(14)

V-R:(mag)

0.46

(15)

R-I:(mag)

-

-

Rotation Period:(hrs)

22.48

(16)

Quality:

3 !

(16)

Lightcurve Amplitude:(mag)

0.13

(16)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

-

-

Spectral Observations:

Y

(17)(18)

IR Observations:

-

-

Remarks

* - orbital type derived from osculating orbital elements

! - quality code according to Lagerkvist et al. (1989) in "Asteroids II" (Eds. R.P.Binzel et al.), Univ.Ariz.Press, Tucson, USA, pp. 1162-1179.

References

( 1) MPO 296305

(002) Ye, Q. (2011) Astron. J. 141, 32. (BVRI photometry of 53 unusual asteroids) (35 NEAs)

(003) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs)

(004) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)

(005) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)

(006) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(007) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs)

(008) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs)

(009) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(010) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs)

(011) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(012) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods"

(013) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(014) Ye, Q. (2011) Astron. J. 141, 32. (BVRI photometry of 53 unusual asteroids) (35 NEAs)

(015) Ye, Q. (2011) Astron. J. 141, 32. (BVRI photometry of 53 unusual asteroids) (35 NEAs)

(016) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods"

(017) deLeon, J. et al. (2010) Astron. Astrophys 517, A23. (Observations, compositional, and physical characterization of near-Earth and Mars-crosser asteroids from a spectroscopic survey)

(018) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)


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