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996 Hilaritas (A923 FC)
Classification: Main-belt Asteroid          SPK-ID: 2000996
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1397164932869588 1.565e-08  
a 3.08969081863596 1.1107e-08 au
q 2.65801005211523 4.6943e-08 au
i .658883594666287 8.817e-07 deg
node 347.37998058 4.9402e-05 deg
peri 146.8198435178194 5.1215e-05 deg
M 24.6337813826393 6.7535e-06 deg
tp 2459064.762594918093
(2020-Aug-03.26259492)
3.7056e-05 TDB
period 1983.677011273818
5.43
1.0697e-05
2.929e-08
d
yr
n .1814811574434822 9.786e-10 deg/d
Q 3.521371585156689 1.2659e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3501  
   data-arc span      38468 days (105.32 yr)  
   first obs. used      1915-11-27  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4493  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:04:57  

Additional Information
 Earth MOID = 1.67211 au 
 Jupiter MOID = 1.51637 au 
 T_jup = 3.210 
[ 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 11.21   n/a MPCxxxxx IRAS observations used: 15
diameter diameter 29.128 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.05 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2010) Minor Planet Bull. 37, 159-161.]
[Ferrero, A. (2011) Minor Planet Bull. 38, 49-50.]
[Strabla, L.; Quadri, U.; Girelli, R. (2011) Minor Planet Bull. 38, 14-15.]
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.120   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.686   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.34 deg.
U-B UB 0.392   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.34 deg.
Tholen spectral type spec_T B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

996 Hilaritas (A923 FC)          Discovered 1923-Mar-21 by Palisa, J. at Vienna
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
1904-Sep-18 03:58 00:02 Jupiter 1.81289105449189 1.81288995347906 1.81289215550483 2.76128628175621 2.58655330710483 2416741.665280317 2.00859434345149 63.4317311663077 5.26928631879507 63.2652642859 6145316.94890501 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
1914-Jul-09 20:22 00:02 Jupiter 1.56122132005147 1.56122099467396 1.56122164543137 1.5110659130117 1.09464304730805 2420323.348910399 1.84128977663537 126.194712627099 25.7855265904978 76.0258723078802 9240026.10457532 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
1975-Jan-05 00:33 < 00:01 Jupiter 1.59557228767874 1.59557198873391 1.59557258662349 1.7660646879081 1.43431803800403 2442417.522732270 0.751805701891816 24.1842491258601 12.6711005824667 -30.9320705511584 3959989.81618923 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
1984-Oct-27 09:19 < 00:01 Jupiter 1.74773715541797 1.7477368259949 1.74773748484093 2.01688171443399 1.76026497800903 2446000.887966422 0.546115074292881 9.91981264274214 4.15863568888124 73.8584361000156 6029859.83030953 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2035-Jul-06 07:38 < 00:01 Jupiter 1.86623044315165 1.86623010602517 1.86623078027802 3.01030299961088 2.85555386929638 2464514.817873476 0.393056322662655 15.7723872392477 6.6831715716957 54.3711643404676 5835020.31906445 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2045-Apr-25 19:50 < 00:01 Jupiter 1.54480333228837 1.54480314901733 1.54480351556011 1.48749428760364 1.05642339756926 2468096.326683025 0.590652013015207 76.4900414067232 17.3724487224268 63.4874919128981 14721853.5625951 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2105-Oct-26 12:24 00:02 Jupiter 1.62839687413412 1.6283962419228 1.62839750634516 1.90616915340711 1.61033110073288 2490194.016869810 1.73518759292924 50.8195776759487 7.14532798954264 -59.2780290721745 5266882.14156936 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2115-Aug-17 15:34 00:02 Jupiter 1.69141834735574 1.69141735144868 1.69141934326222 1.87210151181001 1.58215395216027 2493776.148732296 1.89563314855468 54.9596163427099 6.63987989651492 70.7448514554434 11161993.7763954 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2166-Apr-22 17:26 00:03 Jupiter 1.92125834551828 1.9212567939844 1.92125989705237 3.26531340773442 3.12738459662855 2512287.226487475 2.66344624435796 85.6780738534757 7.70728890202611 49.4082718942324 5373636.36576514 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2176-Feb-14 09:31 00:03 Jupiter 1.53077129997955 1.53077114594231 1.53077145402113 1.46810246667216 1.02404285614289 2515871.896202291 2.98647724453404 183.11978042535 34.6621461074542 -87.275261225216 8038718.75948828 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05
2185-Dec-13 21:06 00:03 Jupiter 1.95219622943446 1.95219430609391 1.95219815277401 2.75805540097385 2.59597879330946 2519462.379470723 3.02753155376682 67.9776696978881 6.58340869641196 26.1824116157361 2917042.70321583 T 46 CATAB v2.0g-lin.ifort 2021-May-03 19:05:56 2021-May-03 19:05

Alternate Designations
 A923 FC = 1977 CG = A915 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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