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381 Myrrha (1894 AS)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000381
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09031048062518027 4.8065e-08  
a 3.231889641293791 2.2523e-08 AU
q 2.940016134461007 1.4737e-07 AU
i 12.55782075881694 4.579e-06 deg
node 125.1248832529139 2.9642e-05 deg
peri 140.7419126799692 4.6184e-05 deg
M 216.9915606474911 3.6038e-05 deg
tp 2457643.528733481316
(2016-Sep-12.02873348)
0.00021363 JED
period 2122.18485445593
5.81
2.2184e-05
6.074e-08
d
yr
n .1696364947870171 1.7733e-09 deg/d
Q 3.523763148126574 2.4557e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1254  
   data-arc span      43897 days (120.18 yr)  
   first obs. used      1894-01-11  
   last obs. used      2014-03-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57403  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:35:09  

Additional Information
 Earth MOID = 1.93551 AU 
 T_jup = 3.142 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.25 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
diameter diameter 120.58 km 2.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
rotation period rot_per 6.572 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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 Bul. 34, 59-64.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.0609   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 24
B-V BV .683 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=9.88, mean=11.80, max.=13.72) deg.
U-B UB .300 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 (1894 AS)          Discovered 1894-Jan-10 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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