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1162 Larissa (1930 AC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001162
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1060573800164291 3.0422e-08  
a 3.92615694925915 2.2682e-08 au
q 3.509759029687428 1.136e-07 au
i 1.874624400437022 3.4564e-06 deg
node 39.65969061755763 0.0001087 deg
peri 207.1116285059702 0.00011015 deg
M 83.82632384368989 1.7841e-05 deg
tp 2458338.850738759259
(2018-Aug-08.35073876)
0.00014008 TDB
period 2841.514730990999
7.78
2.4624e-05
6.742e-08
d
yr
n .1266929909156048 1.0979e-09 deg/d
Q 4.342554868830871 2.5088e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3492  
   data-arc span      33185 days (90.86 yr)  
   first obs. used      1930-01-05  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45339  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:58:49  

Additional Information
 Earth MOID = 2.49635 au 
 Jupiter MOID = .68963 au 
 T_jup = 3.052 
[ 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 9.5   n/a MPO492763  
diameter diameter 40.379 km 0.301 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 6.516 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pligge, Z.; Monnier, A.; Pharo, J.; Stolze, K.; Yim, A.; Ditteon, R. (2011) Minor Planet Bull. 38, 5-7.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Warner, B.D.; Stephens, R.D (2017) Minor Planet Bull. 44, 220-222.]
[Warner, B.D.; Stephens, R.D. (2021) Minor Planet Bull. 48-1, submitted. (Hilda) http://www.planetarysciences.org/lightcurves.html]
geometric albedo albedo 0.169   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.761   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=6.91, mean=8.07, max.=9.18) deg.
U-B UB 0.226   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.91, mean=8.05, max.=9.18) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1162 Larissa (1930 AC)          Discovered 1930-Jan-05 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 AC = 1948 KJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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