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JPL Small-Body Database Browser
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723 Hammonia (A911 UO)
Classification: Main-belt Asteroid          SPK-ID: 2000723
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05471421959313822 3.3374e-08  
a 2.99290001588499 1.1957e-08 au
q 2.829145827195552 1.0183e-07 au
i 4.989675565901392 4.5768e-06 deg
node 163.1896271650459 4.2126e-05 deg
peri 250.2269294240353 5.9423e-05 deg
M 257.4236850408294 4.2397e-05 deg
tp 2459139.366681854710
(2020-Oct-16.86668185)
0.00022321 TDB
period 1891.196866887956
5.18
1.1333e-05
3.103e-08
d
yr
n .1903556453075111 1.1407e-09 deg/d
Q 3.156654204574429 1.2611e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2903  
   data-arc span      42636 days (116.73 yr)  
   first obs. used      1903-02-07  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45688  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:56:23  

Additional Information
 Earth MOID = 1.84421 au 
 Jupiter MOID = 2.05559 au 
 T_jup = 3.247 
[ 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 10.0   n/a MPO452167  
diameter diameter 23.456 km 0.988 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.436 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Slyusarev, I.G.; Belskaya, I.N.; Checha, V.A.; et al. (2015) Lunar & Planetary Sci. LXVI, #1832.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.352   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B C   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)

723 Hammonia (A911 UO)          Discovered 1911-Oct-21 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A911 UO = 1949 YR = 1955 FU1 = A903 CA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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