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JPL Small-Body Database Browser
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618 Elfriede (A906 UM)
Classification: Main-belt Asteroid          SPK-ID: 2000618
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07007712855265255 3.9243e-08  
a 3.191059922420373 1.4832e-08 au
q 2.967439606017703 1.2769e-07 au
i 17.05582432716919 4.5805e-06 deg
node 110.839713159028 1.2682e-05 deg
peri 228.7386840890724 3.2041e-05 deg
M 314.3168912447459 3.0643e-05 deg
tp 2458864.712898594037
(2020-Jan-16.21289859)
0.00017762 TDB
period 2082.096557908047
5.70
1.4517e-05
3.975e-08
d
yr
n .172902644035733 1.2055e-09 deg/d
Q 3.414680238823043 1.5872e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2526  
   data-arc span      41286 days (113.03 yr)  
   first obs. used      1906-10-18  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41566  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:55:20  

Additional Information
 Earth MOID = 1.98061 au 
 Jupiter MOID = 1.89562 au 
 T_jup = 3.124 
[ 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 8.3   n/a MPO452165  
diameter diameter 131.292 km 1.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 14.791 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2006) Minor Planet Bull. 33, 85-88.]
[Carbo, L.; Kragh, K.; Krotz, J.; Meiers, A.; et al. (2009) Minor Planet Bull. 36, 91-94.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Aznar, A.; Garceran, A.C.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 174-181.]
[Klinglesmith III, D.A.; Hendrickx, S.; Kimber, C.; Madden, K. (2017) Minor Planet Bull. 44, 244-246.]
geometric albedo albedo 0.050   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.696   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.46, mean=6.59, max.=11.35) deg.
U-B UB 0.317   0.055 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.46, mean=6.59, max.=11.35) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

618 Elfriede (A906 UM)          Discovered 1906-Oct-17 by Lohnert, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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