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
JPL Small-Body Database Browser
Search: [ help ]  
746 Marlu (A913 EJ)
Classification: Main-belt Asteroid          SPK-ID: 2000746
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2369102740773152 3.637e-08  
a 3.109424909475487 1.2541e-08 au
q 2.372770201948819 1.1372e-07 au
i 17.48015148786149 4.6442e-06 deg
node 1.938518783416216 1.1934e-05 deg
peri 306.7896730996166 1.4612e-05 deg
M 60.35220901955683 8.9916e-06 deg
tp 2458664.755268104470
(2019-Jun-30.25526810)
4.9689e-05 TDB
period 2002.712169876404
5.48
1.2116e-05
3.317e-08
d
yr
n .1797562352767932 1.0875e-09 deg/d
Q 3.846079617002156 1.5512e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3168  
   data-arc span      38410 days (105.16 yr)  
   first obs. used      1915-09-12  
   last obs. used      2020-11-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40413  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:55:50  

Additional Information
 Earth MOID = 1.40405 au 
 Jupiter MOID = 1.74409 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 9.8   n/a MPO502160 IRAS observations used: 14
diameter diameter 74.274 km 1.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.787 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Klinglesmith, D.A.; Dehart, A.; Hanowell, J.; Henderickx, S. (2015) Minor Planet Bull. 42, 101-104.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.032   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.726   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.94 deg.
U-B UB 0.283   0.050 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.94 deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

746 Marlu (A913 EJ)          Discovered 1913-Mar-01 by Kaiser, F. 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
1967-Aug-28 18:33 < 00:01 Jupiter 1.76145865464953 1.76145806069044 1.76145924860902 3.62131436768921 3.48599902837941 2439731.272918887 0.907321284021233 142.576510518456 23.3076313106285 83.1624175759247 2638153.67970209 T 95 CATAB v2.0f-lin.ifort 2020-Dec-18 01:55:58 2020-Dec-18 01:55
2039-Mar-08 08:49 < 00:01 Jupiter 1.72197559332526 1.72197509269488 1.72197609395623 4.00485870796043 3.88009192404129 2465855.867351980 0.543135021708704 107.218254178327 18.1967619710332 82.2029033980799 2803397.35979293 T 95 CATAB v2.0f-lin.ifort 2020-Dec-18 01:55:58 2020-Dec-18 01:55
2110-Sep-08 07:37 00:02 Jupiter 1.72886729601013 1.72886664275673 1.72886794926656 4.26334093334174 4.14683223413145 2491971.817193576 1.73564851991036 150.87315307498 15.9317817121797 80.2860792022839 2653148.45188799 T 95 CATAB v2.0f-lin.ifort 2020-Dec-18 01:55:58 2020-Dec-18 01:55
2182-Mar-09 11:03 00:03 Jupiter 1.79181863454156 1.791816962226 1.7918203068779 4.45737475757906 4.35002947282609 2518086.960731109 2.97348288041293 335.842598786863 23.2818255193472 76.7237583781775 2724349.13753833 T 95 CATAB v2.0f-lin.ifort 2020-Dec-18 01:55:58 2020-Dec-18 01:55
2192-Jun-03 17:06 00:04 Jupiter 1.88556490865493 1.88556248373354 1.88556733416936 3.05741357831332 2.9067764630286 2521826.212818285 4.44576474118929 1847.89473562936 40.9944758223059 84.825106607212 2587397.15276671 T 95 CATAB v2.0f-lin.ifort 2020-Dec-18 01:55:58 2020-Dec-18 01:55

Alternate Designations
 A913 EJ = 1926 WA = 1975 XN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-15 21:51 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin