Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09002100127318802 3.6015e-08  
a 3.228631474225397 2.3467e-08 AU
q 2.937986836173498 1.0846e-07 AU
i 12.56131349982854 3.986e-06 deg
node 125.1237769223556 2.2226e-05 deg
peri 141.7492825263113 3.3452e-05 deg
M 249.7861369996725 2.5542e-05 deg
tp 2457649.223850297068
(2016-Sep-17.72385030)
0.00015154 JED
period 2118.976503947153
5.80
2.3103e-05
6.325e-08
d
yr
n .1698933420589634 1.8523e-09 deg/d
Q 3.519276112277296 2.558e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      43923 days (120.25 yr)  
   first obs. used      1894-01-11  
   last obs. used      2014-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57041  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:34:58  

Additional Information
 Earth MOID = 1.93471 AU 
 T_jup = 3.143 
[ 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. 2014-Mar-01) 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Sep-19 01:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin