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2813 Zappala (1981 WZ)
Classification: Main-belt Asteroid          SPK-ID: 2002813
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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1536041256841593 2.2454e-08  
a 3.134864841283623 1.341e-08 au
q 2.653336668200241 7.1883e-08 au
i 14.76254073462681 6.955e-07 deg
node 231.7781348400504 2.8027e-06 deg
peri 247.4488477612271 9.1335e-06 deg
M 314.2043774466036 6.7619e-06 deg
tp 2459458.398089563748
(2021-Aug-31.89808956)
3.8329e-05 TDB
period 2027.340323514469
5.55
1.3008e-05
3.561e-08
d
yr
n .1775725544569284 1.1394e-09 deg/d
Q 3.616393014367004 1.547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2974  
   data-arc span      26282 days (71.96 yr)  
   first obs. used      1949-03-29  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38771  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:19:04  

Additional Information
 Earth MOID = 1.71089 au 
 Jupiter MOID = 1.82565 au 
 T_jup = 3.143 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457523.5 (2016-May-15.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .151003120981924 2.3241e-08  
q 2.663782364185555 7.4786e-08 au
tp 2457434.457640865929
(2016-Feb-15.95764087)
3.9241e-05 TDB
node 231.8372677213697 2.8042e-06 deg
peri 248.1798937425699 9.1997e-06 deg
i 14.74008533619305 6.9493e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2974  
   data-arc span      26282 days (71.96 yr)  
   first obs. used      1949-03-29  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38771  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:19:04  

Additional Information
 Jupiter MOID = 1.82565 au 
 T_jup = 3.143 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.401639434018189E-16 -1.717116274700032E-15 7.440058086972127E-13 1.53792486919718E-14 1.727916526629308E-13 -1.745364958498326E-15
q -1.717116274700032E-15 5.593018078331719E-15 -2.427026880506288E-12 -4.916471443847446E-14 -5.645638860541378E-13 5.776525144472867E-15
tp 7.440058086972127E-13 -2.427026880506288E-12 1.539826341660335E-9 2.870094714410738E-11 3.442437012232904E-10 -1.778185244690101E-12
node 1.53792486919718E-14 -4.916471443847446E-14 2.870094714410738E-11 7.863739722114709E-12 -6.299351829410315E-13 -9.733716372781315E-13
peri 1.727916526629308E-13 -5.645638860541378E-13 3.442437012232904E-10 -6.299351829410315E-13 8.463533665920749E-11 4.684706519076352E-13
i -1.745364958498326E-15 5.776525144472867E-15 -1.778185244690101E-12 -9.733716372781315E-13 4.684706519076352E-13 4.829251984463163E-13

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 11.01   n/a E2021B10  
diameter diameter 32.040 km 0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.231 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Franco, L.; Klinglesmith III, D.A.; Marchini, A. (2016) Minor Planet Bull. 43, 203-204.]
geometric albedo albedo 0.044   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B T   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2813 Zappala (1981 WZ)          Discovered 1981-Nov-24 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
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-Nov-14 23:38 00:03 Jupiter 1.83010443713712 1.83010403585149 1.830104838424 2.99709922719916 2.83847651776004 2415703.485000062 2.58199560977433 105.821804539253 19.3719475638572 -64.7801102121916 4248909.47034987 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
1912-May-02 08:40 00:02 Jupiter 1.94915168282093 1.94915082773135 1.94915253792025 4.62684072327264 4.53194615421594 2419524.861237661 1.89356192868257 226.145725742746 5.66060390222078 79.9123555610484 16210716.2695567 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
1975-Sep-25 01:21 < 00:01 Jupiter 1.95323610760786 1.95323584083523 1.95323637438126 4.82543886210465 4.73471841810978 2442680.556375228 0.851794277570946 85.7574347245161 8.76254511052031 85.2397804859239 11430160.7812704 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
1985-Nov-15 14:42 < 00:01 Jupiter 1.89986963965982 1.89986936575399 1.89986991356565 1.38822452242314 1.01759692593808 2446385.112404167 0.962276934985197 140.261679712285 93.102589245088 78.9241521589661 2812450.79932806 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
1996-Jan-19 22:02 < 00:01 Jupiter 1.85651784023009 1.85651773414666 1.85651794631352 3.9468086945404 3.82946650171024 2450102.418360187 0.440906347361162 45.2951790842373 4.78366817650071 -89.1750664883171 15630101.0642481 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
2069-Nov-24 08:15 00:01 Jupiter 1.89194205618993 1.89194181092141 1.89194230145867 3.2961222304333 3.15737576198656 2477074.844061584 1.19093004690437 88.2581895876935 11.9865298310145 -82.786154876821 8280355.37379048 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
2079-Nov-11 15:49 00:01 Jupiter 1.85321276983249 1.85321256586215 1.85321297380283 2.69975450783383 2.52478947002093 2480714.158782681 1.49102790740239 43.0266256364958 25.8055441091006 -53.2105027191362 1993033.93003616 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
2090-Apr-16 15:11 00:01 Jupiter 1.97712119569316 1.97712049150408 1.97712189988718 4.63365781569298 4.54025998008207 2484523.132983595 1.38408167666941 163.806373653501 5.52267232836501 78.6723612545896 16077688.7999977 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
2153-Sep-16 15:46 00:03 Jupiter 1.91093650180367 1.91093587719772 1.91093712642362 4.87191039520873 4.78006391134948 2507686.157110711 2.62707412170866 276.971660346468 9.37846370180848 85.2454923578913 11102220.8213435 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
2163-Nov-29 15:37 00:04 Jupiter 1.88647635862621 1.88647612377616 1.88647659347604 1.41134732683249 1.04590007851541 2511412.150761213 4.24199976128429 780.043543120551 20.9407672931927 12.4946770406914 2733049.97621106 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20
2174-Jan-08 11:15 00:03 Jupiter 1.8886446887973 1.8886441247791 1.888645252833 3.81849255005495 3.6991785613196 2515104.968952412 3.14018756452788 298.332845300678 4.78818513662597 87.3721784706144 13935253.264168 T 47 CATAB v2.0f-lin.ifort 2021-Apr-12 14:20:11 2021-Apr-12 14:20

Alternate Designations
 1981 WZ = 1931 VZ = 1949 FC = 1964 TH = 1979 OS14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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