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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09004795735823519 2.0432e-08  
a 3.22367256526881 9.6905e-09 au
q 2.933387435574571 6.773e-08 au
i 12.55849876400437 4.2509e-07 deg
node 125.0754579378304 3.6566e-06 deg
peri 143.8736970394565 8.5627e-06 deg
M 295.4602944743622 5.9259e-06 deg
tp 2459775.508797156452
(2022-Jul-15.00879716)
3.4652e-05 TDB
period 2114.096521901888
5.79
9.5326e-06
2.61e-08
d
yr
n .1702855079086626 7.6783e-10 deg/d
Q 3.513957694963048 1.0563e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3690  
   data-arc span      46589 days (127.55 yr)  
   first obs. used      1894-01-11  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40722  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:33:08  

Additional Information
 Earth MOID = 1.92729 au 
 Jupiter MOID = 1.70299 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 8.42   n/a MPO614063 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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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