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JPL Small-Body Database Browser
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12561 Howard (1998 SX7)
Classification: Main-belt Asteroid          SPK-ID: 2012561
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398849129895073 3.6792e-08  
a 3.098747467160229 1.593e-08 au
q 2.665279447340064 1.1071e-07 au
i .7623639148278007 3.7489e-06 deg
node 42.91846786703475 0.00031255 deg
peri 154.459209367821 0.00031286 deg
M 140.4305153816147 1.4409e-05 deg
tp 2458223.293018712170
(2018-Apr-14.79301871)
7.8148e-05 TDB
period 1992.405372174898
5.45
1.5364e-05
4.206e-08
d
yr
n .1806861219245892 1.3933e-09 deg/d
Q 3.532215486980393 1.8158e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2094  
   data-arc span      10845 days (29.69 yr)  
   first obs. used      1990-02-18  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51059  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:37:26  

Additional Information
 Earth MOID = 1.66355 au 
 Jupiter MOID = 1.42472 au 
 T_jup = 3.207 
[ 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 12.8   n/a MPO350902  

12561 Howard           Discovered 1998 Sept. 20 by Spacewatch at Kitt Peak.
Ron Howard (b. 1954) is a noted director of such films as Apollo 13 and A Beautiful Mind. He began his career as a child star in The Andy Griffith Show, later starring in the long-running TV series Happy Days before beginning his career as a director.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

[ 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
1917-Aug-27 03:14 00:03 Jupiter 1.7002317293541 1.70023000530648 1.70023345339873 2.06988646375349 1.81330325946622 2421467.634723809 2.64150852514436 51.9178017050452 13.6038032768258 -83.8833706789427 730229.890969372 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
1927-Jul-24 12:31 00:02 Jupiter 1.48442491017513 1.48442423282816 1.48442558754421 1.31663835538043 0.76962558490333 2425086.021237106 2.35999335627819 608.988295813401 186.934854784128 43.9633680914542 2485832.8462665 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
1988-Oct-19 03:25 < 00:01 Jupiter 1.66610178312398 1.66610114316076 1.66610242308664 1.93223131768236 1.64825551160131 2447453.642578646 0.732813055321576 51.7381556890182 21.2298586276607 -88.5420680294823 1689510.06880858 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
1998-Sep-15 22:38 < 00:01 Jupiter 1.49932786886412 1.49932748828581 1.49932824944558 1.36573582437885 0.857534085156736 2451072.442711022 0.456511128302006 279.415955411966 131.0180276868 36.1402265750263 2500575.81871136 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
2059-Dec-04 01:10 00:01 Jupiter 1.63168388423745 1.63168323033625 1.63168453813792 1.7921299689129 1.47428319368187 2473431.548533090 1.24900906066058 58.2330826171825 36.8356952239878 -86.5584810204865 1670176.13650941 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
2069-Oct-30 07:22 00:02 Jupiter 1.5181740565833 1.51817321829735 1.51817489488038 1.43463452009593 0.970738098973745 2477049.807163622 1.5317342717328 395.844673222389 96.3894471612011 48.1076971500133 2562442.42267338 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
2131-Jan-13 11:45 00:03 Jupiter 1.59630686194113 1.59630535520313 1.5963083686744 1.65739364159692 1.29835511349167 2499403.989693988 3.12659677446187 137.511074980385 67.3714689161679 -6.59808511117753 734125.38403322 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37
2140-Dec-08 21:43 00:03 Jupiter 1.54740593098071 1.54740424973091 1.5474076122577 1.53900651637723 1.12861711351962 2503021.404531184 3.38593078207521 534.033586842048 64.9500936550912 56.6358042381747 2668479.25956155 T 29 CATAB v2.0f-lin.ifort 2019-Nov-07 03:37:35 2019-Nov-07 03:37

Alternate Designations
 1998 SX7 = 1990 DT7 = 1991 MB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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