( 66251) 1999 GJ2

(1999 GJ2 )

Discovery Circumstances:

LINEAR - Lincoln Laboratory ETS, New Mexico

7 Apr 1999

(1)

Orbital Type:

AM

(*)

Taxonomic Type:

S,Sa;Q

( 2)( 3)( 4)( 5)( 6)( 7)

Albedo:

0.37

( 8)( 9)(10)

Diameter:(km)

0.90 km

(11)(12)

H:(mag)

16.9 R

(13)

G:

0.15

(#)

U-B:(mag)

-

-

B-V:(mag)

0.98

(14)

V-R:(mag)

0.45

(15)

R-I:(mag)

-

-

Rotation Period:(hrs)

2.4621

(16)(17)(18)

Quality:

3 !

(16)(17)(18)

Lightcurve Amplitude:(mag)

0.13

(16)(17)(18)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

-

-

Spectral Observations:

Y

(19)(20)(21)(22)(23)

IR Observations:

-

-

Remarks

* - orbital type derived from osculating orbital elements

# - absolute magnitude H derived from astrometric observation via orbit determination - G value assumed to be 0.15

! - 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) M.P.E.C. 1999-G16

(002) Gietzen, K.M. & C.H.S. Lacy (2007) LPSC 38, 1104. (Visible and near infrared spectra of main belt and near Earth asteroids) (1036,3908,7753,22771,54509,66251,68950,J99JV3,K03YQ117)

(003) Lazzarin, M., Marchi,S. & Magrin, S. (2010) SINEO Database (Spectroscopic Investiation of Near-Earth Objects)

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

(005) 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)

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

(007) 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)

(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) Mueller, M. et al. (2011) Astron. J. 141, 109. (ExploreNEOs. III. PHYSICAL CHARACTERIZATION OF 65 POTENTIAL SPACECRAFT TARGET ASTEROIDS)

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

(011) Mueller, M. et al. (2011) Astron. J. 141, 109. (ExploreNEOs. III. PHYSICAL CHARACTERIZATION OF 65 POTENTIAL SPACECRAFT TARGET ASTEROIDS)

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

(013) Polishook, D. (2012) MPB 39, 187-192. (LIGHTCURVES AND SPIN PERIODS OF NEAR-EARTH ASTEROIDS, THE WISE OBSERVATORY, 2005 - 2010) (1862,3361,5143,10115,40267,66251,68216,86829,105140,138893,141432,14149 5,152931,185851,2009UN3)

(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) Krugly, Yu. N. et al. (2006) IAU Symp. 236, 385-390. (Kharkiv study of near-Earth asteroids) (1036,1627,1685,1862,1980,3103,3200,4179,6611,8567,11405,13553,23187,54509,66251,100085,1999LF6,2004XP14,2005AB,2006CV69,2006BQ6)

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

(018) Polishook, D. (2012) MPB 39, 187-192. (LIGHTCURVES AND SPIN PERIODS OF NEAR-EARTH ASTEROIDS, THE WISE OBSERVATORY, 2005 - 2010) (1862,3361,5143,10115,40267,66251,68216,86829,105140,138893,141432,141495,152931,185851,2009UN3)

(019) Gietzen, K.M. & C.H.S. Lacy (2007) LPSC 38, 1104. (Visible and near infrared spectra of main belt and near Earth asteroids) (1036,3908,7753,22771,54509,66251,68950,J99JV3,K03YQ117)

(020) Binzel, R.P. et al. (2006) LPSC 37, 1491. (The MIT-Hawaii-IRTF joint campaign for NEO spectral reconnaissance.)

(021) Binzel, R.P. et al. Webpage

(022) Lazzarin, M., Marchi,S. & Magrin, S. (2010) SINEO Database (Spectroscopic Investiation of Near-Earth Objects)

(023) 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)


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