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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310074640373318 7.8138e-09  
a 2.898930650570205 8.4605e-09 au
q 2.51914909761891 2.1006e-08 au
i 10.42175489343075 5.9448e-07 deg
node 240.0547318900335 1.8742e-06 deg
peri 117.1778990327931 8.8146e-06 deg
M 55.12225612905663 7.6111e-06 deg
tp 2458924.455149481432
(2020-Mar-15.95514948)
3.7994e-05 TDB
period 1802.831617668497
4.94
7.8924e-06
2.161e-08
d
yr
n .1996858699791211 8.7418e-10 deg/d
Q 3.2787122035215 9.5689e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3794  
   data-arc span      38167 days (104.50 yr)  
   first obs. used      1916-09-24  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39096  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:35:48  

Additional Information
 Earth MOID = 1.53552 au 
 Jupiter MOID = 2.28706 au 
 T_jup = 3.250 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456651.5 (2013-Dec-25.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1348438888737628 7.8868e-09  
q 2.507222973013662 2.1302e-08 au
tp 2457119.057396893105
(2015-Apr-06.55739689)
3.599e-05 TDB
node 240.1334765267017 1.8773e-06 deg
peri 116.7140838128395 8.4436e-06 deg
i 10.41583827928852 5.9339e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3794  
   data-arc span      38167 days (104.50 yr)  
   first obs. used      1916-09-24  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39096  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:35:48  

Additional Information
 Jupiter MOID = 2.28706 au 
 T_jup = 3.250 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.220131124997555E-17 -1.592812126156484E-16 -8.348772185608437E-14 -3.402464609573083E-15 -1.905614926786061E-14 -1.371808132277674E-15
q -1.592812126156484E-16 4.537542554754049E-16 2.14482395969498E-13 9.09219481564149E-15 4.90506535221808E-14 3.888492070807623E-15
tp -8.348772185608437E-14 2.14482395969498E-13 1.295246336649114E-9 8.701494111225367E-12 2.976487144148922E-10 -1.520462631350712E-12
node -3.402464609573083E-15 9.09219481564149E-15 8.701494111225367E-12 3.524260774962086E-12 -9.188263015393626E-13 9.379854262446143E-13
peri -1.905614926786061E-14 4.90506535221808E-14 2.976487144148922E-10 -9.188263015393626E-13 7.129398140328596E-11 -1.123768655620004E-12
i -1.371808132277674E-15 3.888492070807623E-15 -1.520462631350712E-12 9.379854262446143E-13 -1.123768655620004E-12 3.521143936503866E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.19   n/a MPCxxxxx 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. 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:
[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

Alternate Designations
 A916 SL = 2019 FC5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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