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JPL Small-Body Database Browser
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399 Persephone (A895 DD)
Classification: Main-belt Asteroid          SPK-ID: 2000399
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07593300715309285 4.5985e-08  
a 3.050143282757326 1.368e-08 au
q 2.818536731049756 1.409e-07 au
i 13.11385849028823 5.2653e-06 deg
node 346.1966952238029 1.9538e-05 deg
peri 193.4019390929502 3.5656e-05 deg
M 154.6078023496761 2.9551e-05 deg
tp 2458164.882176485829
(2018-Feb-15.38217649)
0.00015958 TDB
period 1945.713035780253
5.33
1.309e-05
3.584e-08
d
yr
n .1850221452906265 1.2448e-09 deg/d
Q 3.281749834464896 1.4719e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2755  
   data-arc span      45715 days (125.16 yr)  
   first obs. used      1895-02-27  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:04:55  

Additional Information
 Earth MOID = 1.82457 au 
 Jupiter MOID = 1.6997 au 
 T_jup = 3.193 
[ 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 9.0   n/a MPO347514  
diameter diameter 39.566 km 1.885 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.136 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Bembrick, C. (2002) Minor Planet Bull. 29, 76-78.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.311   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B X   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)

399 Persephone (A895 DD)          Discovered 1895-Feb-23 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A895 DD = 1948 CC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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