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 ]  
722 Frieda (A911 UN)
Classification: Main-belt Asteroid          SPK-ID: 2000722
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1446726244725656 2.8184e-08  
a 2.171661262085959 4.7069e-09 au
q 1.857481327834579 6.1667e-08 au
i 5.637103415952621 4.1789e-06 deg
node 45.66785612413938 2.9458e-05 deg
peri 257.2281997203077 3.3396e-05 deg
M 47.84481646414293 1.685e-05 deg
tp 2458845.147249851175
(2019-Dec-27.64724985)
5.4591e-05 TDB
period 1168.924748525079
3.20
3.8003e-06
1.04e-08
d
yr
n .3079753426850096 1.0013e-09 deg/d
Q 2.485841196337339 5.3879e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2736  
   data-arc span      40413 days (110.64 yr)  
   first obs. used      1910-03-09  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40089  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:26:31  

Additional Information
 Earth MOID = .852181 au 
 Jupiter MOID = 2.72418 au 
 T_jup = 3.668 
[ 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 12.3   n/a MPO435701  
diameter diameter 8.257 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 131.1 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Polakis, T. (2019) Minor Planet Bull. 46-4, in press.]
geometric albedo albedo 0.252   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

722 Frieda (A911 UN)          Discovered 1911-Oct-18 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A911 UN = 1926 GR = 1946 SH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-25 08:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin