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 ]  
1561 Fricke (1941 CG)
Classification: Main-belt Asteroid          SPK-ID: 2001561
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267206099484425 2.9807e-08  
a 3.197489240948966 1.4361e-08 au
q 2.792301454032331 9.699e-08 au
i 4.319037903626408 3.4084e-06 deg
node 230.6459825632338 4.639e-05 deg
peri 41.5479327717872 4.9116e-05 deg
M 277.8611098992816 1.8987e-05 deg
tp 2459676.995050665693
(2022-Apr-07.49505067)
0.0001115 TDB
period 2088.392210185822
5.72
1.4069e-05
3.852e-08
d
yr
n .1723814129568927 1.1613e-09 deg/d
Q 3.602677027865601 1.6181e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3099  
   data-arc span      29195 days (79.93 yr)  
   first obs. used      1941-02-15  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44058  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:56:24  

Additional Information
 Earth MOID = 1.77623 au 
 Jupiter MOID = 1.49619 au 
 T_jup = 3.178 
[ 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 11.50   n/a E2021B10  
diameter diameter 25.352 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 15.15330 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.063   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1561 Fricke (1941 CG)          Discovered 1941-Feb-15 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1941 CG = 1970 HE = A915 RO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Mar-09 05:40 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin