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1885 Herero (1948 PJ)
Classification: Main-belt Asteroid          SPK-ID: 2001885
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2480545116045857 4.0599e-08  
a 2.249852706528582 4.7817e-09 au
q 1.691766592228379 9.0726e-08 au
i 5.665914740953295 4.3816e-06 deg
node 326.3584230689382 3.6626e-05 deg
peri 5.511954896406154 3.7286e-05 deg
M 336.3418704099619 6.9525e-06 deg
tp 2458681.504186036733
(2019-Jul-17.00418604)
2.3854e-05 TDB
period 1232.620983930319
3.37
3.9296e-06
1.076e-08
d
yr
n .2920605804163003 9.3108e-10 deg/d
Q 2.807938820828785 5.9678e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2173  
   data-arc span      26015 days (71.23 yr)  
   first obs. used      1948-08-09  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46196  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:09:35  

Additional Information
 Earth MOID = .680363 au 
 Jupiter MOID = 2.55839 au 
 T_jup = 3.581 
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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 13.7   n/a PDS3 (MPC 17263)  
diameter diameter 4.657 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.609 h n/a LCDB (Rev. 2019-January); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.255   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1885 Herero (1948 PJ)          Discovered 1948-Aug-09 by Johnson, E. L. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1948 PJ = 1965 SH = 1975 RL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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