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8988 (1979 MA4)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008988
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2131513054743735 3.2613e-08  
a 3.399951985497714 1.7949e-08 au
q 2.675247781238688 1.1426e-07 au
i 4.158166054676735 3.9393e-06 deg
node 187.4898818923871 4.936e-05 deg
peri 146.5510471468941 5.0032e-05 deg
M 139.849232020059 9.8505e-06 deg
tp 2458110.960602213899
(2017-Dec-23.46060221)
5.8861e-05 TDB
period 2289.852997956142
6.27
1.8133e-05
4.965e-08
d
yr
n .1572153323035696 1.245e-09 deg/d
Q 4.124656189756739 2.1775e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2401  
   data-arc span      23713 days (64.92 yr)  
   first obs. used      1955-11-19  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46824  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:16:58  

Additional Information
 Earth MOID = 1.66666 au 
 Jupiter MOID = 1.297 au 
 T_jup = 3.106 
[ 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 12.5   n/a MPO337333  
diameter diameter 15.643 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8988 (1979 MA4)          Discovered 1979-Jun-25 by Helin, E. F., Bus, S. J. at Siding Spring
Reference: 19980808/Numbers.arcLast Updated: 2004-04-19

[ 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
1905-Feb-21 12:14 00:03 Jupiter 1.88222321867584 1.88222191867042 1.88222451868404 4.03016391810281 3.91691176292549 2416898.009845255 2.78832120044425 141.547640532611 18.2758370333074 -69.109394737516 3099080.93878631 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
1918-Oct-14 12:51 00:03 Jupiter 1.4588393726902 1.45883819822651 1.45884054716069 1.39443023207328 0.884990247149699 2421881.035722851 2.79759647019476 901.034563080764 72.2765183520906 -21.0658513706346 2441265.04643806 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
1932-Jun-11 06:34 00:02 Jupiter 1.25950864097482 1.25950819958797 1.25950908236221 0.556829048066903 n/a 2426869.773689434 2.03102177188128 107.220696210011 20.2358327897191 85.283455820903 9277247.7649353 F 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
1946-Jan-11 08:03 00:02 Jupiter 1.57096314470311 1.57096217603405 1.57096411337457 1.63748225680374 1.2660964019559 2431831.835090181 1.66506704069952 182.730197618388 75.1965754389909 58.9328316243846 1900534.36967071 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
1999-Oct-08 20:05 < 00:01 Jupiter 1.98487359692932 1.98487317779534 1.98487401606329 4.67611633181366 4.58394877918768 2451460.337065210 0.350228010536716 33.0909556490281 18.0850250298916 -78.8040328473327 4194622.26178648 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2013-May-08 06:27 < 00:01 Jupiter 1.58966260976756 1.58966216178207 1.58966305775287 2.04805854676317 1.76886419931803 2456420.768868914 0.256962369901133 42.760715403041 19.446556428564 86.0382335650528 2225994.21432786 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2027-Jan-23 18:18 < 00:01 Jupiter 1.27577495211062 1.27577455653678 1.27577534768446 0.556009279799054 n/a 2461429.262329306 0.508081280700096 87.9169538491544 19.711498360742 89.5000946142746 9678341.7366197 F 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2040-Aug-10 13:57 < 00:01 Jupiter 1.43775737537526 1.43775676473052 1.43775798603226 1.28906570487189 0.695295075297484 2466377.081472309 0.979294046819869 765.971314497437 199.26600712669 23.1555943348728 2291438.75434501 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2054-Mar-22 08:01 00:01 Jupiter 1.90070969773542 1.90070895458939 1.90071044088144 2.91666780831153 2.75965239975244 2471348.833767579 1.32586086114993 51.1975124132182 14.9119845489537 -69.8392562720781 2167637.94490619 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2107-Dec-07 04:30 00:03 Jupiter 1.72282169373568 1.72282036082583 1.72282302664572 2.78366266169672 2.60105383060057 2490965.687556616 2.67022751863158 93.8599786131964 16.2542048602048 -77.7161988806581 1611810.17577238 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2121-Aug-31 01:36 00:03 Jupiter 1.3350586565975 1.33505762805754 1.33505968513746 0.662307435629136 n/a 2495981.566604060 3.14663151886811 63.2471156651838 51.2848450253894 -88.9737893353908 3892753.57535535 F 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2135-Mar-17 20:00 00:03 Jupiter 1.34042838317152 1.34042722954472 1.34042953680895 1.11137180442363 n/a 2500928.333608078 3.35156679575819 213.016627218368 22.8174363517525 75.5614497049752 8510769.12358999 F 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17
2148-Oct-25 00:15 00:04 Jupiter 1.76444152809055 1.76443946231641 1.7644435938653 2.2955313324647 2.07590014764132 2505898.510121754 3.95236296015128 141.988417806163 9.49425713503319 -80.8812258685147 1765535.58216196 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:04 2020-Nov-13 03:17

Alternate Designations
 1979 MA4 = 1942 VA = 1986 TJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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