( 31669) 1999 JT6

(1999 JT6 )

Discovery Circumstances:

LINEAR - Lincoln Laboratory ETS, New Mexico

12 May 1999

(1)

Orbital Type:

AP

(*)

Taxonomic Type:

Q,Sq

( 2)( 3)

Albedo:

-

-

Diameter:(km)

2.0 - 4.5 km

($)

H:(mag)

15.90

(#)

G:

0.15

(#)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

-

-

R-I:(mag)

-

-

Rotation Period:(hrs)

5.806

( 4)( 5)

Quality:

3 !

( 4)( 5)

Lightcurve Amplitude:(mag)

0.07-0.27

( 4)( 5)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

-

-

Spectral Observations:

-

-

IR Observations:

-

-

Remarks

* - orbital type derived from osculating orbital elements

$ - diameter range derived from H and assumed albedo for C and S type - 0.04 and 0.20 respectively

# - 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-J50

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

(003) 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)

(004) Galad, A. et al. (2005) Earth, Moon and Planets 97, 147-163. (Joint lightcurve observations of 10 near-Earth asteroids from Modra and Ondrejov) (3553,22753,31669,40267,66146,88188,103067,1001CB21,2004LJ1,2004XO14,)

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


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