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JPL Small-Body Database Browser
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48 Doris
Classification: Main-belt Asteroid          SPK-ID: 2000048
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 170 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07226357325794175 2.8592e-08  
a 3.109514977241535 7.4746e-09 au
q 2.884810313886974 8.8662e-08 au
i 6.547932841670796 3.0785e-06 deg
node 183.5526405516187 2.9165e-05 deg
peri 252.841485007687 3.7564e-05 deg
M 141.508544316728 2.3554e-05 deg
tp 2458213.241118218852
(2018-Apr-04.74111822)
0.00013093 TDB
period 2002.799186506157
5.48
7.2215e-06
1.977e-08
d
yr
n .1797484253166753 6.4812e-10 deg/d
Q 3.334219640596095 8.0148e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2990  
   data-arc span      58415 days (159.93 yr)  
   first obs. used      1860-02-27  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52014  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:15:33  

Additional Information
 Earth MOID = 1.90855 au 
 Jupiter MOID = 1.88457 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453627.5 (2005-Sep-14.0) TDB
Reference: JPL 170 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07489952716655719 2.8702e-08  
q 2.876369144005356 8.956e-08 au
tp 2454234.218152026128
(2007-May-13.71815203)
0.00012741 TDB
node 183.7561487642218 2.9092e-05 deg
peri 257.8516476914596 3.6873e-05 deg
i 6.554595322686486 3.0836e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2990  
   data-arc span      58415 days (159.93 yr)  
   first obs. used      1860-02-27  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52014  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:15:33  

Additional Information
 Jupiter MOID = 1.88457 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.238185828063528E-16 -2.562198184534201E-15 3.845791350393004E-13 2.027126910531652E-15 8.007344472698168E-14 5.291512083940529E-16
q -2.562198184534201E-15 8.020948907709877E-15 -1.41442493639105E-12 -5.406029987310929E-15 -2.921579592564735E-13 -1.560807808454024E-15
tp 3.845791350393004E-13 -1.41442493639105E-12 1.62343242925977E-8 -1.432993345405575E-11 2.903760757616438E-9 2.168918032841036E-12
node 2.027126910531652E-15 -5.406029987310929E-15 -1.432993345405575E-11 8.463590355553986E-10 -8.429200586531892E-10 -1.265682674226283E-11
peri 8.007344472698168E-14 -2.921579592564735E-13 2.903760757616438E-9 -8.429200586531892E-10 1.359594259899848E-9 1.298350202473089E-11
i 5.291512083940529E-16 -1.560807808454024E-15 2.168918032841036E-12 -1.265682674226283E-11 1.298350202473089E-11 9.508458542849311E-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          Discovered 1857-Sep-19 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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