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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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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456634.5 (2013-Dec-08.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1100542514571475 2.9124e-08  
q 3.490522491865544 1.0872e-07 au
tp 2455533.234323978921
(2010-Dec-02.73432398)		 0.00014187 TDB
node 39.78746570470442 0.00010797 deg
peri 212.0108720339211 0.00010938 deg
i 1.887605266188797 3.4636e-06 deg
   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
 Jupiter MOID = .68963 au 
 T_jup = 3.052 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.482347412252243E-16 -3.117403568110777E-15 -3.633324568476521E-13 4.899676326666289E-15 -5.012209630231513E-14 -9.457926379685044E-18
q -3.117403568110777E-15 1.181959929358634E-14 7.812871882718923E-13 -2.212535879786724E-14 1.38828607315217E-13 1.568875683250712E-16
tp -3.633324568476521E-13 7.812871882718923E-13 2.012659482127928E-8 -6.683949884491951E-12 2.512147939890018E-9 -2.05992671184912E-13
node 4.899676326666289E-15 -2.212535879786724E-14 -6.683949884491951E-12 1.165700869456136E-8 -1.165109160097253E-8 -6.827457717262772E-11
peri -5.012209630231513E-14 1.38828607315217E-13 2.512147939890018E-9 -1.165109160097253E-8 1.196464281392076E-8 6.821529481595747E-11
i -9.457926379685044E-18 1.568875683250712E-16 -2.05992671184912E-13 -6.827457717262772E-11 6.821529481595747E-11 1.199672736132793E-11

[ 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

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