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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 
[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1901-Feb-02 22:24 00:01 Jupiter 1.67764498282308 1.67764432607469 1.67764563957147 3.61997812968509 3.47770988182498 2415418.433562021 1.44242757474167 37.1337416581688 28.0082405912517 81.4612643348128 2964609.32925791 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
1925-Mar-06 03:01 00:02 Jupiter 1.66020069301478 1.66019995427882 1.66020143175065 3.58915912303881 3.44407861689095 2424215.625934722 1.60297493710419 36.867993440771 31.6357462430415 -83.8126037606108 2660075.1999019 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
1948-Nov-28 22:11 00:02 Jupiter 1.67606496623225 1.67606422790386 1.67606570456055 3.6253057935733 3.48311850933953 2432884.424203252 1.60577478222414 36.4560626910018 31.7187985737463 -89.0570816554351 2639685.33292612 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
1972-Mar-26 03:39 00:01 Jupiter 1.75993004125298 1.75992949924033 1.75993058326564 3.86095764170713 3.73422415819971 2441402.652075775 1.22743277343429 36.7248956642352 23.2447706642192 79.4562376570633 3669287.47562983 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
1995-Apr-06 04:20 < 00:01 Jupiter 1.8538623161531 1.85386194773943 1.85386268456677 4.09475932911427 3.98161546429582 2449813.680685828 0.620548276011223 36.4287688461756 15.8692359536338 83.1569659041451 5289870.74499978 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2018-Mar-02 04:23 < 00:01 Jupiter 1.87750980348079 1.87750944204706 1.87751016491452 4.06955531922774 3.95714512928553 2458179.682374905 0.289814337473888 35.2560804735064 15.7516882506029 86.0633556222662 5204766.56404881 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2041-Feb-07 09:51 < 00:01 Jupiter 1.81953957208631 1.81953912016258 1.81954002401003 3.77613597352994 3.65077709304729 2466557.910235947 0.884361484754246 40.2779416757895 18.8334904126823 -84.3508150488481 4043373.70453646 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2064-Mar-27 01:43 00:01 Jupiter 1.72558142196617 1.72558077498567 1.72558206894667 3.42088589058005 3.27425351520236 2475006.571724060 1.44039697283568 51.5678996105584 21.9157169316027 -72.4114341646616 3102931.34605075 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2087-Sep-27 15:14 00:02 Jupiter 1.6662578397277 1.66625709590029 1.66625858355521 3.2436959876881 3.08299971695607 2483591.135056889 1.65192037508218 56.9104519385964 22.583024669706 -69.4855169807646 2838486.63461409 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2111-Aug-27 10:12 00:02 Jupiter 1.66454775152362 1.6645470647974 1.66454843824984 3.28095816934694 3.12201307036034 2492324.925316147 1.49214186258307 54.3429297301622 22.6112305832726 -72.1473110892927 2957900.18402636 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2135-Nov-04 21:45 00:01 Jupiter 1.68778426324246 1.68778364065281 1.68778488583203 3.38125196304701 3.22942028505317 2501160.406318722 1.27560533878199 48.7623301563836 23.7979110052144 -79.291961897782 2948398.5111146 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2160-Feb-05 01:02 00:01 Jupiter 1.67619320381923 1.67619254894785 1.67619385869052 3.34209566660306 3.18731128443431 2510018.543341639 1.28992393352511 45.8345378486539 25.9647660341258 89.3011070453337 2606627.71390156 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58
2184-Mar-06 00:35 00:01 Jupiter 1.66213666153957 1.66213594596675 1.66213737711231 3.26531012620195 3.10532655612592 2518814.524370748 1.38650708830216 45.3027189371409 27.0895836935195 81.1172534820179 2325068.82739972 T 46 CATAB v2.0f-lin.ifort 2020-Dec-18 01:58:58 2020-Dec-18 01:58

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