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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 172 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07226357103488794 2.7737e-08  
a 3.109514977798657 7.1505e-09 au
q 2.884810321316456 8.5464e-08 au
i 6.547933444480069 3.0046e-06 deg
node 183.5526301018463 2.7886e-05 deg
peri 252.841493306156 3.5873e-05 deg
M 141.50854594108 2.2939e-05 deg
tp 2458213.241108970468
(2018-Apr-04.74110897)		 0.00012731 TDB
period 2002.79918704441
5.48		 6.9083e-06
1.891e-08		 d
yr
n .1797484252683678 6.2001e-10 deg/d
Q 3.334219634280859 7.6672e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3341  
   data-arc span      58597 days (160.43 yr)  
   first obs. used      1860-02-27  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50228  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:08:33  

Additional Information
 Earth MOID = 1.90855 au 
 Jupiter MOID = 1.88457 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453893.5 (2006-Jun-07.0) TDB
Reference: JPL 172 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07482756284267889 2.7647e-08  
q 2.877196353597161 8.5576e-08 au
tp 2454233.478138130220
(2007-May-12.97813813)		 0.00012381 TDB
node 183.7564402933012 2.7818e-05 deg
peri 257.6831712526504 3.5331e-05 deg
i 6.554299912426785 3.0094e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3341  
   data-arc span      58597 days (160.43 yr)  
   first obs. used      1860-02-27  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50228  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:08:33  

Additional Information
 Jupiter MOID = 1.88457 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.643691728374185E-16 -2.358523980347804E-15 1.471873708977597E-13 1.905851925686858E-15 3.232911042148262E-14 5.008658527354671E-16
q -2.358523980347804E-15 7.32321776238571E-15 -6.016398898752908E-13 -5.229055557400978E-15 -1.284761557511746E-13 -1.446379822681082E-15
tp 1.471873708977597E-13 -6.016398898752908E-13 1.532884726666004E-8 -7.989179855887579E-12 2.71314698898491E-9 1.48902890339301E-12
node 1.905851925686858E-15 -5.229055557400978E-15 -7.989179855887579E-12 7.738133953806176E-10 -7.69712203379891E-10 -7.041061744852041E-12
peri 3.232911042148262E-14 -1.284761557511746E-13 2.71314698898491E-9 -7.69712203379891E-10 1.248279384163846E-9 7.2787250649726E-12
i 5.008658527354671E-16 -1.446379822681082E-15 1.48902890339301E-12 -7.041061744852041E-12 7.2787250649726E-12 9.056347470516164E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1951-Jan-30 18:11 < 00:01 Jupiter 1.89714255597649 1.89714228509232 1.89714282686055 3.70026560307332 3.57757179777599 2433677.257387484 0.633286823364495 44.8299974837301 11.2278201389381 -87.5137160773268 5176005.25966122 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
1961-Mar-15 14:02 < 00:01 Jupiter 1.94382728522839 1.94382698359444 1.94382758686235 2.90325987869654 2.74907587262402 2437374.084692494 0.532675286075076 28.2121247573222 8.20691517821703 -75.2007167866756 4807919.4534385 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
2022-Sep-11 11:31 < 00:01 Jupiter 1.91720506779716 1.91720480316093 1.91720533243335 3.9548591947956 3.8415244209733 2459833.979651595 0.222615123632812 29.1141071841563 11.2969037922269 -89.3332619377924 5459711.31948611 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
2032-Oct-31 20:24 < 00:01 Jupiter 1.91280629611459 1.91280598930646 1.91280660292272 2.9978576618919 2.84631642996543 2463537.349834339 0.341028782339943 28.4908961076698 9.57042322364892 -76.2376686176969 4701897.48354515 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
2094-Apr-22 05:16 < 00:01 Jupiter 1.95512897472802 1.95512861155037 1.955129337906 4.17311951852156 4.06798039327928 2485989.719211324 0.981353606516786 66.8324585182581 11.6092849181465 80.5319570235089 5541061.09034056 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
2104-Jun-19 08:22 00:01 Jupiter 1.89106926409924 1.89106895501228 1.89106957318631 3.19332583469949 3.04983877750653 2489699.848852717 1.15145258957346 59.6473566126373 10.6252069893987 -81.2240445951862 4595359.28334176 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
2176-Feb-04 05:23 00:02 Jupiter 1.87438980816014 1.87438952466365 1.87439009165662 3.42419727045241 3.28958084558651 2515861.724238619 1.9527218850966 113.716521292084 11.1832361992876 -86.814319587217 4674200.25021572 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09
2186-Mar-16 06:47 00:02 Jupiter 1.98250295175347 1.98250238916859 1.98250351433823 2.94586914031645 2.79707827539798 2519554.782372192 2.10295754924895 29.3259095424861 18.5853531766143 -56.044902947719 3605112.75564006 T 172 CATAB v2.0f-lin.ifort 2020-Aug-24 22:09:13 2020-Aug-24 22:09

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