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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 ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 97 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2368689577022748 3.4848e-08  
a 3.110213475622109 1.227e-08 au
q 2.373500451419931 1.0843e-07 au
i 17.47878573306701 4.3838e-06 deg
node 1.932923935990652 1.1854e-05 deg
peri 306.8562042783514 1.4382e-05 deg
M 96.23773913541629 8.9777e-06 deg
tp 2458664.917182044015
(2019-Jun-30.41718204)
4.9312e-05 TDB
period 2003.474065333678
5.49
1.1856e-05
3.246e-08
d
yr
n .179687876289051 1.0633e-09 deg/d
Q 3.846926499824287 1.5176e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3295  
   data-arc span      38480 days (105.35 yr)  
   first obs. used      1915-09-12  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39691  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:49:23  

Additional Information
 Earth MOID = 1.40283 au 
 Jupiter MOID = 1.74337 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 9.87   n/a E2021B10 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

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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 1.76145864777466 1.76145807360023 1.76145922194948 3.62131429637025 3.4859989537537 2439731.272918583 0.884656636015267 135.263978546153 22.4396817336562 82.904880974061 2739694.76359572 T 97 CATAB v2.0f-lin.ifort 2021-Feb-24 00:49:32 2021-Feb-24 00:49
2039-Mar-08 08:49 < 00:01 Jupiter 1.72197558871592 1.72197510137012 1.72197607606221 4.0048587578388 3.88009197518419 2465855.867358428 0.528455368185611 103.092631427559 17.6367781809045 81.9282600791582 2956972.39693794 T 97 CATAB v2.0f-lin.ifort 2021-Feb-24 00:49:32 2021-Feb-24 00:49
2110-Sep-08 07:37 00:02 Jupiter 1.72886728844709 1.72886667473149 1.72886790216554 4.26334086816462 4.14683216660629 2491971.817182897 1.69143007214895 144.757265161781 14.9050327871006 80.4927239493152 2825765.17844879 T 97 CATAB v2.0f-lin.ifort 2021-Feb-24 00:49:32 2021-Feb-24 00:49
2182-Mar-09 11:03 00:03 Jupiter 1.79181861607049 1.79181701240352 1.79182021975691 4.45737463955757 4.35002935077197 2518086.960703880 2.89903020893555 323.896500112197 22.2038726388742 76.7938867111727 2903431.54410892 T 97 CATAB v2.0f-lin.ifort 2021-Feb-24 00:49:32 2021-Feb-24 00:49
2192-Jun-03 17:06 00:04 Jupiter 1.8855649252342 1.88556255565684 1.8855672953911 3.0574135041382 2.90677638636835 2521826.212795378 4.33871476294467 1816.553270811 38.6265534204081 84.8406326471488 2739120.79189519 T 97 CATAB v2.0f-lin.ifort 2021-Feb-24 00:49:32 2021-Feb-24 00:49

Alternate Designations
 A913 EJ = 1926 WA = 1975 XN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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