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
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05496775438856565 3.2451e-08  
a 2.992486221906725 1.1491e-08 au
q 2.827995974249789 9.95e-08 au
i 4.990094691096433 4.5622e-06 deg
node 163.1858920621319 4.0609e-05 deg
peri 250.4762018587796 5.8089e-05 deg
M 333.3633421079172 4.1924e-05 deg
tp 2459140.401991989624
(2020-Oct-17.90199199)
0.00022031 TDB
period 1890.804669276265
5.18
1.0891e-05
2.982e-08
d
yr
n .190395129570838 1.0966e-09 deg/d
Q 3.156976469563661 1.2122e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3082  
   data-arc span      42911 days (117.48 yr)  
   first obs. used      1903-02-07  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:20:45  

Additional Information
 Earth MOID = 1.84364 au 
 Jupiter MOID = 2.05401 au 
 T_jup = 3.247 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456309.5 (2013-Jan-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05440815656642641 3.283e-08  
q 2.831678055654707 1.007e-07 au
tp 2457223.066064011218
(2015-Jul-19.56606401)
0.00022053 TDB
node 163.3668307480964 4.0498e-05 deg
peri 245.6983553631798 5.826e-05 deg
i 4.994052630052777 4.5693e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3082  
   data-arc span      42911 days (117.48 yr)  
   first obs. used      1903-02-07  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:20:45  

Additional Information
 Jupiter MOID = 2.05401 au 
 T_jup = 3.247 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.077783537554955E-15 -3.286804057750452E-15 -1.479948127271631E-12 -8.702068541233675E-16 -2.742015869194929E-13 1.854473976997851E-16
q -3.286804057750452E-15 1.014145692424134E-14 4.813394813429292E-12 3.110050039259823E-15 8.785222672104222E-13 -5.153249778643157E-16
tp -1.479948127271631E-12 4.813394813429292E-12 4.863271571021263E-8 -1.11020659725322E-11 9.245813441580653E-9 -2.095602615795769E-12
node -8.702068541233675E-16 3.110050039259823E-15 -1.11020659725322E-11 1.640058578492694E-9 -1.635392059717742E-9 -1.35164444839724E-12
peri -2.742015869194929E-13 8.785222672104222E-13 9.245813441580653E-9 -1.635392059717742E-9 3.394212852159653E-9 9.241476894884571E-13
i 1.854473976997851E-16 -5.153249778643157E-16 -2.095602615795769E-12 -1.35164444839724E-12 9.241476894884571E-13 2.087862842784755E-11

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

[ show close-approach data ]
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-Oct-22 02:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin