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958 Asplinda (A921 SD)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000958
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1842561579864511 1.9397e-08  
a 3.985708296088817 2.1777e-08 au
q 3.251316998596767 8.1234e-08 au
i 5.628693948238785 1.4409e-06 deg
node 343.109967072495 5.5251e-06 deg
peri 92.89021521858108 9.0439e-06 deg
M 177.7913381160882 6.6564e-06 deg
tp 2457765.126940803637
(2017-Jan-11.62694080)
5.0548e-05 TDB
period 2906.408753014114
7.96
2.382e-05
6.522e-08
d
yr
n .1238642016979405 1.0151e-09 deg/d
Q 4.720099593580867 2.5789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2816  
   data-arc span      36147 days (98.97 yr)  
   first obs. used      1921-09-28  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:58:00  

Additional Information
 Earth MOID = 2.27293 au 
 Jupiter MOID = .715274 au 
 T_jup = 3.018 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456705.5 (2014-Feb-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1868957355313419 1.9587e-08  
q 3.243517592887601 8.3242e-08 au
tp 2457767.036572005417
(2017-Jan-13.53657201)
4.9984e-05 TDB
node 343.1584750548685 5.5244e-06 deg
peri 92.82642385589992 8.9487e-06 deg
i 5.629107536968416 1.4406e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2816  
   data-arc span      36147 days (98.97 yr)  
   first obs. used      1921-09-28  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:58:00  

Additional Information
 Jupiter MOID = .715274 au 
 T_jup = 3.018 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.83637344223302E-16 -1.591060467289699E-15 -2.127485541619614E-13 1.610742482371447E-15 1.323370314402971E-14 -1.112647340351929E-15
q -1.591060467289699E-15 6.929177813425152E-15 9.853451391920681E-13 -1.009406784063151E-14 -5.152166498725497E-14 1.727510392083339E-15
tp -2.127485541619614E-13 9.853451391920681E-13 2.498387428950453E-9 -4.421196452460212E-11 3.286113504593893E-10 -3.787168016072861E-11
node 1.610742482371447E-15 -1.009406784063151E-14 -4.421196452460212E-11 3.051897196110274E-11 -3.649495711260388E-11 -1.250301085303655E-12
peri 1.323370314402971E-14 -5.152166498725497E-14 3.286113504593893E-10 -3.649495711260388E-11 8.007992660779952E-11 -3.613392659486169E-12
i -1.112647340351929E-15 1.727510392083339E-15 -3.787168016072861E-11 -1.250301085303655E-12 -3.613392659486169E-12 2.075415386781806E-12

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 10.4   n/a MPO473775 IRAS observations used: 10
diameter diameter 45.112 km 0.405 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 16.543 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Stephens, R.D.; Coley, D.R. (2018) Minor Planet Bull. 45, 147-161.]
geometric albedo albedo 0.045   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.834   0.082 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.89 deg.

958 Asplinda (A921 SD)          Discovered 1921-Sep-28 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
1953-Dec-09 02:25 00:01 Jupiter 1.94899133256178 1.94899104080561 1.94899162431794 4.90411447202849 4.81468047856745 2434720.600685972 1.06940258484562 20.890451175342 10.6012916604507 62.1050656884464 8690542.14921795 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
1977-Apr-13 18:57 < 00:01 Jupiter 1.87827877009944 1.87827840459429 1.8782791356046 4.61868947320867 4.51999766838317 2443247.289530361 0.927807580411394 20.8942475570927 12.0860665851439 46.9138498610873 6842302.15140595 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2000-Dec-21 12:37 < 00:01 Jupiter 1.84610787350128 1.84610759560123 1.84610815140133 4.5118557816795 4.40899217718888 2451900.025400568 0.430198505201957 14.3906224815298 12.2096031371943 62.0545003717952 7617245.00038459 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2025-Jan-04 20:50 < 00:01 Jupiter 1.86996174781232 1.86996153752745 1.86996195809719 4.61589721778897 4.51670036197093 2460680.368083231 0.346729120255449 13.9086988086921 9.32643962224185 -76.8173428852776 9272903.47096424 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2049-Mar-25 06:46 < 00:01 Jupiter 1.8783683093272 1.87836807952789 1.87836853912651 4.62803465675185 4.52955121941804 2469525.781718937 0.917116199041427 18.5871478765089 10.2257028657491 -81.7341014791485 8339309.71970878 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2073-Jun-10 11:07 00:01 Jupiter 1.86514161061861 1.86514132365325 1.86514189758397 4.49760180955105 4.39546992537766 2478368.962900418 1.25333990571883 23.7258662873964 10.8359443235304 -70.6696362659739 7346203.66756416 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2097-Jun-14 00:17 00:01 Jupiter 1.85100987750443 1.85100959696907 1.85101015803978 4.36575251024731 4.25964723339904 2487138.512118025 1.22229861917617 24.2532736743817 9.92035543128375 -70.1882234026037 7913466.93091755 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2121-Feb-11 20:56 < 00:01 Jupiter 1.8861279467529 1.88612776455977 1.88612812894603 4.48176539715455 4.38041788953239 2495781.371964713 0.856752450908092 19.6894042534365 8.31538168731661 87.5361980347828 11181440.6226631 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
2144-Jun-11 19:15 < 00:01 Jupiter 1.96773976826269 1.96773947350209 1.96774006302328 4.86539384306375 4.77610177541442 2504302.301875728 0.638281835499622 18.9887136472067 13.066322918774 72.5507209309944 7469738.62954872 T 36 CATAB v2.0f-lin.ifort 2021-Mar-16 11:59:03 2021-Mar-16 11:59
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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