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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 ]

[ hide orbit diagram ]

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.


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 
[ hide covariance matrix ]
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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 1.89714255502994 1.89714228446498 1.8971428255949 3.70026559626321 3.57757179067006 2433677.257388468 0.631894388231137 44.7538242580918 11.215036295121 -87.5545715609405 5182396.90901306 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
1961-Mar-15 14:02 < 00:01 Jupiter 1.94382728404606 1.94382698333893 1.94382758475319 2.90325987363352 2.74907586718063 2437374.084695314 0.531812169044268 28.1792827634384 8.18068203986244 -75.2129254730628 4821710.30895728 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
2022-Sep-11 11:31 < 00:01 Jupiter 1.91720506645034 1.91720480220627 1.91720533069441 3.9548592484779 3.84152447615857 2459833.979661809 0.22229501275311 29.0844017744527 11.2799108061394 -89.3204925309168 5469111.45788331 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
2032-Oct-31 20:24 < 00:01 Jupiter 1.9128062949854 1.9128059886584 1.9128066013124 2.99785766514207 2.8463164332968 2463537.349836856 0.340073152378235 28.456093326436 9.54466822207455 -76.1643199065729 4718474.74615367 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
2094-Apr-22 05:16 < 00:01 Jupiter 1.95512897311767 1.95512861066918 1.95512933556659 4.17311953434025 4.06798040941909 2485989.719213695 0.979213505748568 66.7005015742653 11.5997606488159 80.5442769141632 5544299.67602321 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
2104-Jun-19 08:22 00:01 Jupiter 1.89106926292319 1.89106895416882 1.89106957167767 3.19332578251561 3.0498387227762 2489699.848838415 1.14866987509305 59.5171184808179 10.5922353348855 -81.1708409275593 4611509.30790685 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
2176-Feb-04 05:23 00:02 Jupiter 1.87438980649115 1.8743895235877 1.8743900893946 3.42419721716256 3.28958078999361 2515861.724224017 1.94816811015778 113.45787856407 11.1534776873981 -86.7883985172881 4686416.05508631 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34
2186-Mar-16 06:47 00:02 Jupiter 1.98250295330415 1.98250239099367 1.98250351561462 2.94586914382786 2.79707827921566 2519554.782362518 2.0976971561206 29.2699740572274 18.5742747418317 -56.0005733889836 3605168.83337242 T 173 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:09 2020-Nov-13 04:34

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