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3873 Roddy (1984 WB)
Classification: Mars-crossing Asteroid          SPK-ID: 2003873
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1339372546669253 4.96e-08  
a 1.892179135738017 5.1243e-09 au
q 1.638745856959232 9.4141e-08 au
i 23.35245923976699 4.2957e-06 deg
node 250.0443880325384 1.182e-05 deg
peri 267.7039362613657 1.9521e-05 deg
M 159.3290053030288 1.7327e-05 deg
tp 2458579.740292024470
(2019-Apr-06.24029202)
4.5505e-05 TDB
period 950.6962940181708
2.60
3.8619e-06
1.057e-08
d
yr
n .3786698257531225 1.5382e-09 deg/d
Q 2.145612414516803 5.8106e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2172  
   data-arc span      13043 days (35.71 yr)  
   first obs. used      1984-11-19  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37761  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:08:50  

Additional Information
 Earth MOID = .786315 au 
 Jupiter MOID = 3.07231 au 
 T_jup = 3.847 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO302086  
diameter diameter 5.021 km 0.581 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 2.4782 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
[Warner, B.D. (2008) Minor Planet Bull. 35, 56-60.]
[Warner, B.D. (2009) Minor Planet Bull. 36, 172-176.]
[Warner, B.D. (2011) Minor Planet Bull. 38, 82-86.]
[Warner, B.D. (2013). Minor Planet Bull. 40, 36-42.]
[Klinglesmith III, D.A.; Hendrickx, S.; Madden, K.; Montgomery, S. (2016) Minor Planet Bull. 43, 123-128.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 57-65.]
geometric albedo albedo 0.419   0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B S   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)

3873 Roddy (1984 WB)          Discovered 1984-Nov-21 by Shoemaker, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 WB = 1953 XK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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