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3254 Bus (1982 UM)
Classification: Outer Main-belt Asteroid          SPK-ID: 2003254
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1586725674424635 2.5837e-08  
a 3.985754227682799 3.2604e-08 au
q 3.353324371181716 1.072e-07 au
i 4.406808092761692 1.101e-06 deg
node 42.96725351157082 8.1279e-06 deg
peri 302.9135062023623 1.074e-05 deg
M 335.0887750309537 7.0774e-06 deg
tp 2459401.620705150999
(2021-Jul-06.12070515)
5.8874e-05 TDB
period 2906.458993659493
7.96
3.5663e-05
9.764e-08
d
yr
n .1238620605986007 1.5198e-09 deg/d
Q 4.618184084183882 3.7777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2452  
   data-arc span      13935 days (38.15 yr)  
   first obs. used      1982-09-26  
   last obs. used      2020-11-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46388  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:53:43  

Additional Information
 Earth MOID = 2.34758 au 
 Jupiter MOID = .841937 au 
 T_jup = 3.029 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.27   n/a E2021B10  
diameter diameter 31.104 km 0.442 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 6.62 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Binzel, R.P.; Sauter, L.M. (1992) Icarus 95, 222-238.]
[Warner, B.D.; Stephens, R.D. (2017) Minor Planet Bull. 44, 331-334.]
geometric albedo albedo 0.073   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
SMASSII spectral type spec_B T   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3254 Bus (1982 UM)          Discovered 1982-Oct-17 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1982 UM = 1982 SW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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