Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05496775462578063 3.2453e-08  
a 2.992486222030923 1.1531e-08 au
q 2.827995973657297 9.952e-08 au
i 4.990094691789794 4.5756e-06 deg
node 163.1858932078476 4.0661e-05 deg
peri 250.4762011349154 5.8273e-05 deg
M 333.3633416209827 4.2176e-05 deg
tp 2459140.401994555828
(2020-Oct-17.90199456)
0.00022164 TDB
period 1890.804669393977
5.18
1.0929e-05
2.992e-08
d
yr
n .190395129558985 1.1005e-09 deg/d
Q 3.156976470404547 1.2165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3046  
   data-arc span      42720 days (116.96 yr)  
   first obs. used      1903-02-07  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44231  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:35:19  

Additional Information
 Earth MOID = 1.84364 au 
 Jupiter MOID = 2.05401 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-August); 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2112-Sep-19 09:01 < 00:01 Hygie 0.0453371323554376 0.0453259119663689 0.0453483527966054 3.85905653263668 3.85905631180202 2492713.875791270 0.563372718732541 563.917450147537 46.7059210937415 -7.92673336624714 23253.0286657068 T 34 CATAB v2.0f-lin.ifort 2020-Feb-22 15:35:36 2020-Feb-22 15:35

Alternate Designations
 A911 UO = 1949 YR = 1955 FU1 = A903 CA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jun-02 15:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin