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4276 Clifford (1981 XA)
Classification: Mars-crossing Asteroid          SPK-ID: 2004276
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2034050272109849 1.6172e-08  
a 2.010315402063219 4.6744e-09 au
q 1.601407143003888 3.3556e-08 au
i 21.02179962486722 4.8594e-07 deg
node 76.86930322771933 2.1263e-06 deg
peri 3.555352848625471 4.6215e-06 deg
M 241.7820352633047 4.8462e-06 deg
tp 2459542.381581526652
(2021-Nov-23.88158153)
1.4644e-05 TDB
period 1041.10546670062
2.85
3.6312e-06
9.942e-09
d
yr
n .34578629304568 1.206e-09 deg/d
Q 2.41922366112255 5.6252e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1573  
   data-arc span      14201 days (38.88 yr)  
   first obs. used      1981-10-05  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42226  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:08:40  

Additional Information
 Earth MOID = .616839 au 
 Jupiter MOID = 2.85542 au 
 T_jup = 3.724 
[ 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 14.65   n/a E2020-QM5  
diameter diameter 4.708 km 1.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 3.23935 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.087   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
SMASSII spectral type spec_B Cb   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)

4276 Clifford (1981 XA)          Discovered 1981-Dec-02 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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