Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1399083028797285 1.7881e-08  
a 3.098571027107329 1.3967e-08 au
q 2.665055213352445 5.5646e-08 au
i .7624000635254022 1.597e-06 deg
node 42.91587497268313 8.1094e-05 deg
peri 154.3141994487942 8.191e-05 deg
M 212.1791378974077 1.1441e-05 deg
tp 2460214.538682307909
(2023-Sep-27.03868231)
6.6904e-05 TDB
period 1992.235205788877
5.45
1.347e-05
3.688e-08
d
yr
n .1807015551948589 1.2218e-09 deg/d
Q 3.532086840862213 1.5921e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      11472 days (31.41 yr)  
   first obs. used      1990-02-18  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49081  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 13:25:50  

Additional Information
 Earth MOID = 1.66411 au 
 Jupiter MOID = 1.42273 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 12.83   n/a E2021B10  

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 00:02 Jupiter 1.70023190848967 1.70023039405335 1.70023342292377 2.0698874118245 1.81330437215342 2421467.634901096 2.32953140390062 22.1144823150225 6.0795385536289 -67.9230750593042 1336991.6860413 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
1927-Jul-24 12:31 00:02 Jupiter 1.48442497774368 1.48442434460114 1.48442561090587 1.31663882605793 0.769626427958807 2425086.021425816 2.07156848171476 564.212854192598 92.6886641619306 44.7735720748217 4948794.42423234 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
1988-Oct-19 03:25 < 00:01 Jupiter 1.66610177468386 1.66610126462463 1.6661022847428 1.93223156002278 1.64825579583567 2447453.642538505 0.653103828155463 14.6162930736838 10.9874687217693 -36.1517724373252 2330022.41911324 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
1998-Sep-15 22:37 < 00:01 Jupiter 1.49932806844411 1.49932787579889 1.49932826109009 1.36573666989197 0.857535523079646 2451072.442665983 0.389789290058364 146.159209003749 62.7974425688824 33.6066639303154 4930107.81828586 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
2059-Dec-04 01:10 00:01 Jupiter 1.63168372507762 1.63168323225336 1.63168421790142 1.79212965318426 1.47428277748317 2473431.548318185 1.06311724785863 28.2531719843804 13.2598711291128 -14.8503549373639 2345318.74045798 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
2069-Oct-30 07:22 00:01 Jupiter 1.51817437628259 1.51817382017387 1.5181749323964 1.43463577292958 0.97074007471503 2477049.806929591 1.32602017611141 253.3374426125 51.3820558288167 50.4425798969433 4995331.68703382 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
2131-Jan-13 11:45 00:03 Jupiter 1.59630670962337 1.59630540525881 1.5963080139843 1.65739335675307 1.29835471314071 2499403.989479246 2.73296309554851 121.261623322072 16.190430655783 -5.60283822651425 927508.957003969 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26
2140-Dec-08 21:42 00:03 Jupiter 1.54740624505546 1.5474049073337 1.54740758279569 1.53900783549364 1.1286190134138 2503021.404342570 2.97484478795411 425.280903459656 35.0761933583858 58.1584832599596 5085848.4675404 T 38 CATAB v2.0g-lin.ifort 2021-Aug-25 13:26:21 2021-Aug-25 13:26

Alternate Designations
 1998 SX7 = 1990 DT7 = 1991 MB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-17 17:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin