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373 Melusina (A893 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000373
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 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1379382969853175 2.279e-08  
a 3.120022524596638 1.0304e-08 au
q 2.689651930997946 6.8943e-08 au
i 15.37840570350588 9.5566e-07 deg
node 3.644597235172692 1.3272e-06 deg
peri 348.6980759174598 7.2919e-06 deg
M 52.67239549855246 5.7193e-06 deg
tp 2458905.979458480841
(2020-Feb-26.47945848)
3.1655e-05 TDB
period 2012.959424824544
5.51
9.9721e-06
2.73e-08
d
yr
n .178841160711115 8.8597e-10 deg/d
Q 3.550393118195329 1.1726e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3421  
   data-arc span      43453 days (118.97 yr)  
   first obs. used      1902-04-04  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39287  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:18:11  

Additional Information
 Earth MOID = 1.68512 au 
 Jupiter MOID = 1.90076 au 
 T_jup = 3.147 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456793.5 (2014-May-16.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427366990757587 2.3145e-08  
q 2.672453591004544 7.0549e-08 au
tp 2456888.878266898611
(2014-Aug-19.37826690)
2.7886e-05 TDB
node 3.836874340088385 1.3189e-06 deg
peri 347.7713680724644 6.7845e-06 deg
i 15.42969470951849 9.5634e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3421  
   data-arc span      43453 days (118.97 yr)  
   first obs. used      1902-04-04  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39287  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:18:11  

Additional Information
 Jupiter MOID = 1.90076 au 
 T_jup = 3.147 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.357054483808398E-16 -1.621260481943372E-15 -4.152700953527224E-13 -9.014942210607817E-15 -1.057938575296679E-13 -1.168947577527145E-14
q -1.621260481943372E-15 4.97713130030601E-15 1.281021007073112E-12 2.75036920905139E-14 3.263098347001995E-13 3.593477082689823E-14
tp -4.152700953527224E-13 1.281021007073112E-12 7.776532473159854E-10 -4.459376302220357E-12 1.877845301988336E-10 3.311934149783367E-12
node -9.014942210607817E-15 2.75036920905139E-14 -4.459376302220357E-12 1.739592542007221E-12 -1.500930986706192E-12 -8.749301951098617E-14
peri -1.057938575296679E-13 3.263098347001995E-13 1.877845301988336E-10 -1.500930986706192E-12 4.602947701294436E-11 1.384878925883294E-12
i -1.168947577527145E-14 3.593477082689823E-14 3.311934149783367E-12 -8.749301951098617E-14 1.384878925883294E-12 9.145918367227157E-13

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 9.18   n/a E2021B10 IRAS observations used: 18
diameter diameter 98.695 km 0.947 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 12.97 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ivarsen, K.; Willis, S.; Ingleby, L.; Matthews, D.; Simet, M. (2004) Minor Planet Bull. 31, 29-33.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.040   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.669   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.06, mean=14.28, max.=21.50) deg.
U-B UB 0.371   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.06, mean=14.28, max.=21.50) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

373 Melusina (A893 RA)          Discovered 1893-Sep-15 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A893 RA = 1937 TL = 1948 TZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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