Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
71 Niobe
Classification: Main-belt Asteroid          SPK-ID: 2000071
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1733307196051126 3.4038e-08  
a 2.755786874426204 8.9833e-09 au
q 2.278124352403585 9.4471e-08 au
i 23.26502635543798 3.8318e-06 deg
node 316.0334710304808 9.8873e-06 deg
peri 266.7156888932718 1.4526e-05 deg
M 5.88838426176078 1.2683e-05 deg
tp 2457373.168686083881
(2015-Dec-16.66868608)
5.8835e-05 JED
period 1670.963132229511
4.57
8.1705e-06
2.237e-08
d
yr
n .2154446097919969 1.0535e-09 deg/d
Q 3.233449396448822 1.054e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1633  
   data-arc span      55257 days (151.29 yr)  
   first obs. used      1864-01-14  
   last obs. used      2015-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55396  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:33:15  

Additional Information
 Earth MOID = 1.40838 au 
 Jupiter MOID = 2.20049 au 
 T_jup = 3.205 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.30 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 13
magnitude slope G 0.40   n/a PDS3 (MPC 17257) Fit
diameter diameter 83.42 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 13
rotation period rot_per 35.864 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Shepard, M.K.; Harris, A.W.; Pravec, P.; et al. (2006) Minor Planet Bul. 33, 102-103.]
[Sada, P.V.; Warner, B.D. (2007) Minor Planet Bul. 34, 37-38.]
[Pilcher, F. (2010) Minor Planet Bul. 37, 98-99.]
[Warner, B.D. (2011) http://www.minorplanetobserver.com/PDO/PDOLig htcurves.htm]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2015) Astron. Astrophys., in press.arXiv:1510.07422]
geometric albedo albedo 0.3052   0.013 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 13
B-V BV .803 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=9.74, mean=12.38, max.=13.81) deg.
U-B UB .439 mag .032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=9.74, mean=12.38, max.=13.81) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Xe   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)

71 Niobe          Discovered 1861-Aug-13 by Luther, R. at Dusseldorf
Aug. 14 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-10 12:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin