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 ]  
1995 Hajek (1971 UP1)
Classification: Main-belt Asteroid          SPK-ID: 2001995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05466432499393963 6.5828e-08  
a 2.528951115760789 9.2416e-09 au
q 2.390707710075055 1.6638e-07 au
i 10.82335307222331 4.2508e-06 deg
node 47.22808163807407 2.1387e-05 deg
peri 133.5636480285473 4.199e-05 deg
M 252.3091229396604 3.883e-05 deg
tp 2459439.925739177722
(2021-Aug-13.42573918)
0.00015886 TDB
period 1468.956985236025
4.02
8.052e-06
2.205e-08
d
yr
n .2450718459548064 1.3434e-09 deg/d
Q 2.667194521446523 9.7467e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2264  
   data-arc span      29081 days (79.62 yr)  
   first obs. used      1941-03-19  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46046  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:13:32  

Additional Information
 Earth MOID = 1.40178 au 
 Jupiter MOID = 2.30921 au 
 T_jup = 3.425 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2   n/a MPO412178  
diameter diameter 12.683 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.040   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1995 Hajek (1971 UP1)          Discovered 1971-Oct-26 by Kohoutek, L. at Bergedorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1971 UP1 = 1941 EA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-30 18:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin