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 ]  
1885 Herero (1948 PJ)
Classification: Main-belt Asteroid          SPK-ID: 2001885
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 .2480499066372918 3.978e-08  
a 2.249966590808521 4.6375e-09 au
q 1.691862588021442 8.8773e-08 au
i 5.666177357627647 4.0542e-06 deg
node 326.3524062100867 3.5993e-05 deg
peri 5.56449677712625 3.6632e-05 deg
M 93.12860364714764 6.8487e-06 deg
tp 2458681.608369174356
(2019-Jul-17.10836917)
2.3265e-05 TDB
period 1232.714575343556
3.37
3.8112e-06
1.043e-08
d
yr
n .2920384062950407 9.029e-10 deg/d
Q 2.808070593595601 5.7878e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2497  
   data-arc span      26397 days (72.27 yr)  
   first obs. used      1948-08-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45429  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:03:15  

Additional Information
 Earth MOID = .681378 au 
 Jupiter MOID = 2.56166 au 
 T_jup = 3.580 
[ 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 13.7   n/a PDS3 (MPC 17263)  
diameter diameter 4.657 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.609 h n/a LCDB (Rev. 2020-October); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.255   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1885 Herero (1948 PJ)          Discovered 1948-Aug-09 by Johnson, E. L. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1948 PJ = 1965 SH = 1975 RL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-21 04:55 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin