( 4257) Ubasti

(1987 QA )

Discovery Circumstances:

J. E. Mueller - Palomar Mountain

23 Aug 1987

(1)

Orbital Type:

AP

(*)( 2)

Taxonomic Type:

-

-

Albedo:

0.376

( 3)

Diameter:(km)

1.3 km

( 4)

H:(mag)

15.80

(#)

G:

0.15

(#)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

-

-

R-I:(mag)

-

-

V-I:(mag)

-

-

B-R:(mag)

-

-

Rotation Period:(hrs)

-

( 5)

Quality:

L

( 5)

Lightcurve Amplitude:(mag)

0.36

( 5)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

-

-

Spectral Observations:

-

-

IR Observations:

Y

( 6)

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

L - as rotation quality code means lightcurve data obtained

References

(001) I.A.U.Circ. 4446

(002) Hahn, G. et al. (1991) Astron. & Astrophys. 246, 603-618. (Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter)

(003) Usui, F. et al. (2011) Pub. Astron. Soc. Japan 63, 1117-1138. (Asteroid Catalog Using AKARI: AKARI/IRC Mid-Infrared Asteroid Survey)

(004) Usui, F. et al. (2011) Pub. Astron. Soc. Japan 63, 1117-1138. (Asteroid Catalog Using AKARI: AKARI/IRC Mid-Infrared Asteroid Survey)

(005) Skiff, B.A. et al. (2012) MPB 39, 111-130. (LOWELL OBSERVATORY NEAR-EARTH ASTEROID PHOTOMETRIC SURVEY (NEAPS) - 2008 MAY THROUGH 2008 DECEMBER) (46 NEAs)

(006) Usui, F. et al. (2011) Pub. Astron. Soc. Japan 63, 1117-1138. (Asteroid Catalog Using AKARI: AKARI/IRC Mid-Infrared Asteroid Survey)


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