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JPL Small-Body Database Browser
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381 Myrrha (A894 AC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000381
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09012289106325261 3.201e-08  
a 3.225266728454379 1.4484e-08 au
q 2.934596366435952 9.913e-08 au
i 12.55618833652568 3.4016e-06 deg
node 125.0805516750103 1.8855e-05 deg
peri 143.4040795966112 2.9608e-05 deg
M 160.5037914851555 2.3089e-05 deg
tp 2457657.243782089268
(2016-Sep-25.74378209)
0.00013533 TDB
period 2115.664903026728
5.79
1.4252e-05
3.902e-08
d
yr
n .1701592721441728 1.1462e-09 deg/d
Q 3.515937090472805 1.579e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2581  
   data-arc span      45740 days (125.23 yr)  
   first obs. used      1894-01-11  
   last obs. used      2019-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:01:33  

Additional Information
 Earth MOID = 1.92842 au 
 Jupiter MOID = 1.70151 au 
 T_jup = 3.144 
[ 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 8.25   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
diameter diameter 127.639 km 1.686 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.572 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Bianchi, E.; Padova, E. (1921) Mem. Soc. Astron. Ital. 2, 45-54.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Mansego, E.A.; Rodriguez, P.B.; de Haro, J.L.; Chiner, O.R.; et al. (2016) Minor Planet Bull. 43, 332-336.]
geometric albedo albedo 0.064   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.683   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=9.88, mean=11.80, max.=13.72) deg.
U-B UB 0.300   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.28, mean=9.29, max.=13.72) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

381 Myrrha (A894 AC)          Discovered 1894-Jan-10 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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