(163693) Atira

(2003 CP20 )

Discovery Circumstances:

LINEAR - Lincoln Laboratory ETS, New Mexico

11 Feb 2003

(1)

Orbital Type:

AT

(*)

Taxonomic Type:

-

-

Albedo:

-

-

Diameter:(km)

1.7 - 3.7 km

($)

H:(mag)

16.30

(#)

G:

0.15

(#)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

-

-

R-I:(mag)

-

-

Rotation Period:(hrs)

3.3989

( 2)

Quality:

2 !

( 2)

Lightcurve Amplitude:(mag)

0.4

( 2)

Spin Vector:

-

-

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. 2003-C63

( 2) Petr Pravec's Ondrejov NEO Photometric Program Webpage

NEODyS Page of (163693) Atira