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838 Seraphina (A916 SL)
Classification: Main-belt Asteroid          SPK-ID: 2000838
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 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .130890492660496 3.0737e-08  
a 2.898295835166468 1.0612e-08 au
q 2.518936465425665 8.9346e-08 au
i 10.42261571846667 3.9032e-06 deg
node 240.0531436270689 1.937e-05 deg
peri 117.1042254250413 2.4561e-05 deg
M 15.24800289756113 1.593e-05 deg
tp 2458924.165131628363
(2020-Mar-15.66513163)
7.9607e-05 TDB
period 1802.239466926173
4.93
9.8986e-06
2.71e-08
d
yr
n .199751479537845 1.0971e-09 deg/d
Q 3.27765520490727 1.2001e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3204  
   data-arc span      37931 days (103.85 yr)  
   first obs. used      1916-09-24  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:23:22  

Additional Information
 Earth MOID = 1.53687 au 
 Jupiter MOID = 2.28773 au 
 T_jup = 3.251 
[ 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 10.1   n/a MPO502161 IRAS observations used: 8
diameter diameter 58.095 km 0.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 15.67 h n/a LCDB (Rev. 2019-August); 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. (1987) Icarus 72, 135-208.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.048   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.703   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.47, mean=4.46, max.=7.45) deg.
U-B UB 0.324   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.47, mean=4.46, max.=7.45) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

838 Seraphina (A916 SL)          Discovered 1916-Sep-24 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 SL = 2019 FC5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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