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48 Doris (A857 SA)
Classification: Main-belt Asteroid          SPK-ID: 2000048
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 173 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07226357123645114 2.7714e-08  
a 3.109514977741711 7.1355e-09 au
q 2.884810320636861 8.5373e-08 au
i 6.547933486070919 2.998e-06 deg
node 183.5526297742236 2.7844e-05 deg
peri 252.841494009943 3.5803e-05 deg
M 141.5085456381548 2.2904e-05 deg
tp 2458213.241110677367
(2018-Apr-04.74111068)
0.0001271 TDB
period 2002.799186989393
5.48
6.8939e-06
1.887e-08
d
yr
n .1797484252733056 6.1871e-10 deg/d
Q 3.334219634846561 7.6512e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3383  
   data-arc span      58662 days (160.61 yr)  
   first obs. used      1860-02-27  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49952  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:00  

Additional Information
 Earth MOID = 1.90855 au 
 Jupiter MOID = 1.88457 au 
 T_jup = 3.205 
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Orbital Elements at Epoch 2453923.5 (2006-Jul-07.0) TDB
Reference: JPL 173 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07483032824657873 2.7616e-08  
q 2.877261785307653 8.5452e-08 au
tp 2454233.380557916114
(2007-May-12.88055792)
0.00012359 TDB
node 183.7562806909892 2.7775e-05 deg
peri 257.6624379105641 3.5266e-05 deg
i 6.55421139829541 3.0027e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3383  
   data-arc span      58662 days (160.61 yr)  
   first obs. used      1860-02-27  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49952  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:00  

Additional Information
 Jupiter MOID = 1.88457 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.626589579084434E-16 -2.352496276964109E-15 1.374428097351267E-13 1.906787865478661E-15 3.040396835705441E-14 4.995052454757956E-16
q -2.352496276964109E-15 7.30199857528263E-15 -5.673488479369085E-13 -5.240326775173502E-15 -1.217004021064673E-13 -1.442417359741983E-15
tp 1.374428097351267E-13 -5.673488479369085E-13 1.527337461178905E-8 -7.754217748681194E-12 2.701860369101985E-9 1.457417823620787E-12
node 1.906787865478661E-15 -5.240326775173502E-15 -7.754217748681194E-12 7.714720743422657E-10 -7.673436053496504E-10 -6.734912721831407E-12
peri 3.040396835705441E-14 -1.217004021064673E-13 2.701860369101985E-9 -7.673436053496504E-10 1.243685571488373E-9 6.968779657559304E-12
i 4.995052454757956E-16 -1.442417359741983E-15 1.457417823620787E-12 -6.734912721831407E-12 6.968779657559304E-12 9.016353805494408E-12

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 7.1   n/a MPO473760 IRAS observations used: 10
diameter diameter 216.473 km 4.757 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.89 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Debehogne, H.; Lagerkvist, C.-I.; Zappala, V. (1982) Astron. Astrophys. Suppl. Ser. 50, 277-281.]
[Schober, H.J.; Schroll, A. (1982) Astron. Astrophys. 107, 402-405.]
[Higgins, D.; Pilcher, F. (2009) Minor Planet Bull. 36, 143-144.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo albedo 0.065   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.716   0.012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.85, mean=7.88, max.=12.86) deg.
U-B UB 0.442   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.85, mean=7.88, max.=12.86) deg.
Tholen spectral type spec_T CG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 6 color indices
SMASSII spectral type spec_B Ch   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)

48 Doris (A857 SA)          Discovered 1857-Sep-19 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A857 SA = 1948 FE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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