( 4957) Brucemurray

(1990 XJ )

Discovery Circumstances:

E. F. Helin - Palomar Mountain

15 Dec 1990

(1)

Orbital Type:

AM

(*)

Taxonomic Type:

S

( 2)( 3)

Albedo:

0.28

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

Diameter:(km)

2.4 km

( 8)( 9)(10)(11)

H:(mag)

14.90

(#)

G:

0.15

(#)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

-

-

R-I:(mag)

-

-

Rotation Period:(hrs)

2.8922

(12)(13)(14)

Quality:

4 !

(12)(13)(14)

Lightcurve Amplitude:(mag)

0.14-0.38

(12)(13)(14)

Spin Vector:

l=358,b=-50

(15)

Sense of Rotation:

-

-

Radar Observations:

-

-

Spectral Observations:

Y

(16)(17)(18)

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) I.A.U.Circ. 5147

(002) 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.)

(003) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.)

(004) Wolters, S.D. et al. (2012) ACM2012, 6343. (PHYSICAL CHARACTERISATION OF FAST-ROTATING NEAR-EARTH ASTEROIDS) (1866,2102,3554,3838,4957,7482,89830)

(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) Harris(DLR), A.W. et al. (2011) Astron. J. 141, 75. (ExploreNEOs. II. THE ACCURACY OF THE WARM SPITZER NEAR-EARTH OBJECT SURVEY)

(007) 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)

(008) Wolters, S.D. et al. (2012) ACM2012, 6343. (PHYSICAL CHARACTERISATION OF FAST-ROTATING NEAR-EARTH ASTEROIDS) (1866,2102,3554,3838,4957,7482,89830)

(009) Harris(DLR), A.W. et al. (2011) Astron. J. 141, 75. (ExploreNEOs. II. THE ACCURACY OF THE WARM SPITZER NEAR-EARTH OBJECT SURVEY)

(010) 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)

(011) 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)

(012) Pravec, P. et al. (1996) Icarus 124, 471-482. (Lightcurves of 7 Near-Earth Asteroids)(1627,4957,6569,1993UC,1994AH2,1994CB,1994LX)

(013) Pravec, P. et al. (1998) Icarus 136, 124-153. (Lightcurves of 26 Near-Earth Asteroids)(1943,2063,2100,3103,3122,3200,3691,3752,4341,4957,5143,5587,7025,7341,7480,7482,7822,8034,1989UQ,1992CC1,1992QN,1 995FX,1997BR,1997GH3,1997GL3,1997SE5)

(014) Delbo, M. et al. (2003) Icarus 166, 116-130. (Keck observations of near-Earth asteroids in the thermal infrared)

(015) Kaasalainen, M. et al. (2004) Icarus 167, 178-196. (Photometry and models of eight near-Earth asteroids;1580,1627,1980,2100,3199,3908,4957,5587)

(016) 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.)

(017) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.)

(018) Michelsen, R. et al. (2006) Astron. Astrophys. 451, 331-337. (Spectroscopy of near-Earth asteroids) (2329,2002AG29,4957,35107,2002NY31,1917,25916,2002QE15,2002DB4,2002TB58,1978CA,4954)


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