( 85938) 1999 DJ4

(1999 DJ4 )

Discovery Circumstances:

LINEAR - Lincoln Laboratory ETS, New Mexico

24 Feb 1999

(1)

Orbital Type:

AP

(*)( 2)

Taxonomic Type:

Sq

( 3)

Albedo:

0.30

( 4)( 5)( 6)( 7)

Diameter:(km)

0.478 km

( 8)( 9)(10)

H:(mag)

18.600

(11)

G:

0.06

(12)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

-

-

R-I:(mag)

-

-

Rotation Period:(hrs)

2.5141+17.73

(13)(14)(15)(16)(17)

Quality:

3RB !

(13)(14)(15)(16)(17)

Lightcurve Amplitude:(mag)

0.11

(13)(14)(15)(16)(17)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

Y

(18)(19)

Spectral Observations:

Y

(20)

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.

B - in rotation quality code means Binary asteroid

R - as rotation quality code means Radar observations

References

( 1) M.P.E.C. 1999-D21

(002) Kistler, J. et al. (2010) DPS 42, 5709. (abstract) (Bulk Densities of Binary Asteroids from the Warm Spitzer NEO Survey) (1999DJ4)

(003) Bus, S.J. & Binzel, R.P. (2002) Icarus 158,106-145. (Phase II of the Small Main-Belt Asteroid Spectrographic Survey: A Feature-Based Taxonomy.)

(004) 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)

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

(006) Trilling, D.E. et al. (2010) Astron. Journal 140, 770-784. (EXPLORENEOs. I. DESCRIPTION AND FIRST RESULTS FROM THE WARM SPITZER NEAR-EARTH OBJECT SURVEY) (diameters & albedos for 101 NEOs)

(007) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of NEOs)

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

(009) Trilling, D.E. et al. (2010) Astron. Journal 140, 770-784. (EXPLORENEOs. I. DESCRIPTION AND FIRST RESULTS FROM THE WARM SPITZER NEAR-EARTH OBJECT SURVEY) (diameters & albedos for 101 NEOs)

(010) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of 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) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(013) Pravec, P. et al. (2006) Icarus 181, 63-93. (Photometric survey of binary near-Earth asteroids)

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

(015) Pravec, P. et al. (2004) I.A.U. Circ. 8316. (1999 DJ4)

(016) Benner, L. A. M. et al., (2004) I.A.. Circ. 8329. (1999 DJ4) (radar obs. binary asteroid)

(017) Pravec, P. et al (2016) Icarus 267,267-295. (Binary asteroid population. 3. Secondary rotations and elongations) (..,..)

(018) JPL's NEO Radar Detection Program Webpage

(019) Benner, L. A. M. et al., (2004) I.A.. Circ. 8329. (1999 DJ4) (radar obs. binary asteroid)

(020) Binzel, R.P. et al. (2001) Icarus 151,139-149. (Spectral Properties of Near-Earth Objects: Palomar and IRTF Results for 48 Objects Including Spacecraft Targets (9969) Braille and (10302) 1989 ML)


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