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47 Aglaja (A857 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000047
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 121 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299723843223381 2.9905e-08  
a 2.882399928324967 6.8126e-09 au
q 2.507767537070035 8.6498e-08 au
i 4.9748525564586 3.7122e-06 deg
node 3.05800623356959 3.9004e-05 deg
peri 314.90873766682 4.1889e-05 deg
M 172.9073442716445 1.6215e-05 deg
tp 2458341.999160894440
(2018-Aug-11.49916089)
7.9627e-05 TDB
period 1787.433051961375
4.89
6.3369e-06
1.735e-08
d
yr
n .2014061447532074 7.1404e-10 deg/d
Q 3.2570323195799 7.698e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3444  
   data-arc span      58772 days (160.91 yr)  
   first obs. used      1860-02-24  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:42:58  

Additional Information
 Earth MOID = 1.49588 au 
 Jupiter MOID = 2.04938 au 
 T_jup = 3.276 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455394.5 (2010-Jul-17.0) TDB
Reference: JPL 121 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1343245504367509 3.0207e-08  
q 2.491638250705511 8.7761e-08 au
tp 2454766.341551320175
(2008-Oct-26.84155132)
7.3267e-05 TDB
node 3.141851170344291 3.8954e-05 deg
peri 313.9957758534212 4.161e-05 deg
i 4.984862489768045 3.7119e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3444  
   data-arc span      58772 days (160.91 yr)  
   first obs. used      1860-02-24  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:42:58  

Additional Information
 Jupiter MOID = 2.04938 au 
 T_jup = 3.276 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.124613066375291E-16 -2.645124684381021E-15 2.006686348706166E-13 3.439546820260146E-16 9.76127716071516E-15 -3.691100162396955E-16
q -2.645124684381021E-15 7.702026088236023E-15 -5.185145361717611E-13 -1.063674739977346E-15 -1.419095759806155E-14 1.152863609790719E-15
tp 2.006686348706166E-13 -5.185145361717611E-13 5.368061825341284E-9 5.078780006392523E-12 1.083477412595904E-9 -8.59820607504913E-13
node 3.439546820260146E-16 -1.063674739977346E-15 5.078780006392523E-12 1.517433295430754E-9 -1.510275521428584E-9 2.861796672716334E-11
peri 9.76127716071516E-15 -1.419095759806155E-14 1.083477412595904E-9 -1.510275521428584E-9 1.731376963096373E-9 -2.865261643972567E-11
i -3.691100162396955E-16 1.152863609790719E-15 -8.59820607504913E-13 2.861796672716334E-11 -2.865261643972567E-11 1.37780321030931E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.19   n/a E2021B10 IRAS observations used: 20
magnitude slope G 0.16   n/a PDS3 (MPC 17257) Fit
diameter diameter 168.174 km 1.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 13.178 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Debehogne, H. (1979) Messenger 18, 27-28.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Millis, R.L.; Wasserman, L.H.; Bowell, E.; Harris, A.W.; et al. (1989) Icarus 81, 375-385.]
[Chernova, G.P.; Lupishko, D.F.; Shevchenko, V.G.; Kiselev, N.N.; Saljes, R. (1991) Kin. Fiz. Neb. Tel 7, 20-26; Kinematics and Physics of Celestial Bodies 7, 15-21.]
[Michalowski, T. (1996) Icarus 123, 456-462.]
[Pilcher, F. (2012) Minor Planet Bull. 39, 220-222.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 133-135.]
geometric albedo albedo 0.082   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.665   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.07, mean=12.75, max.=18.61) deg.
U-B UB 0.300   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.07, mean=12.75, max.=18.61) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B B   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)

47 Aglaja (A857 RA)          Discovered 1857-Sep-15 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A857 RA = 1948 EU = 1982 DX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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