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57 Mnemosyne (A859 SA)
Classification: Main-belt Asteroid          SPK-ID: 2000057
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1115974062129725 1.9542e-08  
a 3.157178126544963 7.3012e-09 au
q 2.804845236670213 6.3336e-08 au
i 15.19866035700198 2.9251e-07 deg
node 199.0909368324184 1.8843e-06 deg
peri 210.4010538594176 7.6423e-06 deg
M 249.1716344402562 7.5863e-06 deg
tp 2459831.305516352613
(2022-Sep-08.80551635)
4.3845e-05 TDB
period 2049.024044882482
5.61
7.1078e-06
1.946e-08
d
yr
n .175693399449906 6.0946e-10 deg/d
Q 3.509511016419713 8.116e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3157  
   data-arc span      58764 days (160.89 yr)  
   first obs. used      1859-12-22  
   last obs. used      2020-11-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45499  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:47:35  

Additional Information
 Earth MOID = 1.82257 au 
 Jupiter MOID = 1.95724 au 
 T_jup = 3.142 
[ show covariance matrix ]

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 7.0   n/a MPO473760 IRAS observations used: 5
diameter diameter 112.59 km 2.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 25.324 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2019) Minor Planet Bull. 46, 445-448.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 344-346.]
geometric albedo albedo 0.2149   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
B-V BV 0.817   0.011 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=12.12, mean=12.51, max.=12.91) deg.
U-B UB 0.410   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=12.12, mean=12.51, max.=12.91) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

57 Mnemosyne (A859 SA)          Discovered 1859-Sep-22 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A859 SA = 1959 NT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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