( 4544) Xanthus

(1989 FB )

Discovery Circumstances:

H. E. Holt, N. G. Thomas - Palomar Mountain

31 Mar 1989

(1)

Orbital Type:

AP

(*)

Taxonomic Type:

Q;Sq,Sr

( 2)( 3)( 4)

Albedo:

0.37

( 5)

Diameter:(km)

1.1 - 2.6 km

($)

H:(mag)

17.10

(#)

G:

0.15

(#)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

-

-

R-I:(mag)

-

-

Rotation Period:(hrs)

37.65

( 6)

Quality:

2 !

( 6)

Lightcurve Amplitude:(mag)

0.27

( 6)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

Y

( 7)( 8)( 9)

Spectral Observations:

Y

(10)(11)

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) I.A.U.Circ. 4766

(002) 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)

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

(004) 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)

(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) R. Behrend Courbes des lumiere, Observatoire de Geneve website

(007) Benner, L.A.M. et al. (1996) B.A.A.S. 28, 1105. 10.41. (Radar Observations of Near-Earth Asteroids 2062 Aten, 2101 Adonis, 3103 Eger, 4544 Xanthus, and 1992 QN)

(008) Benner, L.A.M. et al. (1997) Icarus 130, 296-312. (Radar Detection of Near-Earth Asteroids 2062 Aten, 2101 Adonis, 3103 Eger, 4544 Xanthus, and 1992 QN)

(009) Ostro, S.J. et al. (1991) Astron. J. 102, 1490-1502. (Asteroid radar astrometry)

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

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


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