Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .105745764451797 1.6653e-08  
a 3.92487786770385 1.9888e-08 au
q 3.509838657203567 6.6696e-08 au
i 1.874790520760902 1.0141e-06 deg
node 39.65504280231277 5.0071e-05 deg
peri 206.8744233915416 5.1105e-05 deg
M 134.3080107905348 1.1619e-05 deg
tp 2458336.911920662982
(2018-Aug-06.41192066)
9.0174e-05 TDB
period 2840.126261390575
7.78
2.1587e-05
5.91e-08
d
yr
n .12675492807976 9.6342e-10 deg/d
Q 4.339917078204132 2.1991e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3717  
   data-arc span      33413 days (91.48 yr)  
   first obs. used      1930-01-05  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44792  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:23:39  

Additional Information
 Earth MOID = 2.49671 au 
 Jupiter MOID = .689232 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 9.58   n/a E2021B10  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-28 16:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin