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JPL Small-Body Database Browser
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822 Lalage (A916 GJ)
Classification: Main-belt Asteroid          SPK-ID: 2000822
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1554517135943333 3.0183e-08  
a 2.255158508505732 5.0041e-09 au
q 1.904590253931675 6.8767e-08 au
i .7172436766837474 3.9439e-06 deg
node 210.11108948535 0.00026493 deg
peri 247.2493408919624 0.00026524 deg
M 225.7846025298105 1.3293e-05 deg
tp 2459061.673004058735
(2020-Jul-31.17300406)
4.6121e-05 TDB
period 1236.983867652143
3.39
4.1172e-06
1.127e-08
d
yr
n .2910304729222524 9.6868e-10 deg/d
Q 2.605726763079788 5.782e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      37828 days (103.57 yr)  
   first obs. used      1916-04-01  
   last obs. used      2019-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4489  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:58:02  

Additional Information
 Earth MOID = .921666 au 
 Jupiter MOID = 2.54784 au 
 T_jup = 3.608 
[ 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 12.18   n/a PDS3 (MPC 17260)  
diameter diameter 8.243 km 0.336 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.345 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Higgins, D. (2011) Minor Planet Bull. 38, 41-46.]
[Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Turk, J.; et al. (2014) Minor Planet Bull. 41, 139-143.]
[Stephens, R.D. (2014) Minor Planet Bull. 41, 171-175.]
[Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.]
geometric albedo albedo 0.349   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.766   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.14 deg.
Tholen spectral type spec_T DXCU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 1 color indices

822 Lalage (A916 GJ)          Discovered 1916-Mar-31 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 GJ = 1943 EJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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