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248 Lameia (A885 LA)
Classification: Main-belt Asteroid          SPK-ID: 2000248
[ 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0657271897723566 3.0702e-08  
a 2.470388143099317 5.498e-09 au
q 2.308016472806448 7.6645e-08 au
i 4.060819414361712 3.3526e-06 deg
node 246.7817108914936 4.6129e-05 deg
peri 11.3681057845834 5.3692e-05 deg
M 309.6370384537646 2.8828e-05 deg
tp 2459398.906080571363
(2021-Jul-03.40608057)		 0.00011368 TDB
period 1418.228531698209
3.88		 4.7345e-06
1.296e-08		 d
yr
n .25383779267854 8.474e-10 deg/d
Q 2.632759813392185 5.8594e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3698  
   data-arc span      49534 days (135.62 yr)  
   first obs. used      1885-06-06  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:47  

Additional Information
 Earth MOID = 1.29136 au 
 Jupiter MOID = 2.39063 au 
 T_jup = 3.478 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456170.5 (2012-Aug-31.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06651414270404352 3.0634e-08  
q 2.305775540232516 7.6553e-08 au
tp 2456563.142559854558
(2013-Sep-27.64255985)		 0.00011141 TDB
node 246.8806090417372 4.6172e-05 deg
peri 11.69270930212184 5.3599e-05 deg
i 4.058645367440793 3.3517e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3698  
   data-arc span      49534 days (135.62 yr)  
   first obs. used      1885-06-06  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40821  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:47  

Additional Information
 Jupiter MOID = 2.39063 au 
 T_jup = 3.478 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.3846656799346E-16 -2.340049862594356E-15 1.519604043818668E-13 -1.329555830976683E-15 3.263159018203846E-14 2.678712908305066E-16
q -2.340049862594356E-15 5.860399113085937E-15 -3.345885083626495E-13 3.159931241077605E-15 -7.314382524732423E-14 -7.486828813120849E-16
tp 1.519604043818668E-13 -3.345885083626495E-13 1.241184967584741E-8 -7.355209465170437E-12 3.04431456781845E-9 -1.449967335401988E-12
node -1.329555830976683E-15 3.159931241077605E-15 -7.355209465170437E-12 2.131879685061831E-9 -2.127695027692157E-9 -6.20879369617273E-13
peri 3.263159018203846E-14 -7.314382524732423E-14 3.04431456781845E-9 -2.127695027692157E-9 2.872896625405165E-9 2.582546011362089E-13
i 2.678712908305066E-16 -7.486828813120849E-16 -1.449967335401988E-12 -6.20879369617273E-13 2.582546011362089E-13 1.123391448141878E-11

[ 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 10.27   n/a E2021B10  
diameter diameter 50.120 km 0.311 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.912 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Pilcher, F.; Benishek, V.; Hills, K. (2015) Minor Planet Bull. 42, 137-139.]
geometric albedo albedo 0.062   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.830   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.89 deg.
U-B UB 0.340   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.89 deg.

248 Lameia (A885 LA)          Discovered 1885-Jun-05 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A885 LA = 1959 LO 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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