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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .155707414380848 1.7874e-08  
a 2.255514704889146 4.3076e-09 au
q 1.904314342092876 4.098e-08 au
i .7171787048462069 6.7523e-07 deg
node 210.1029090733359 1.541e-05 deg
peri 247.1879335234701 1.747e-05 deg
M 40.46321730643349 7.3157e-06 deg
tp 2459061.432761207215
(2020-Jul-30.93276121)
2.4982e-05 TDB
period 1237.276946770183
3.39
3.5444e-06
9.704e-09
d
yr
n .2909615352809672 8.3351e-10 deg/d
Q 2.606715067685417 4.9783e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3087  
   data-arc span      38334 days (104.95 yr)  
   first obs. used      1916-04-01  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:29:47  

Additional Information
 Earth MOID = .921076 au 
 Jupiter MOID = 2.54582 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 12.11   n/a E2021B10  
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. 2020-October); 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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