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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1746987184401412 3.4846e-08  
a 2.755877637437466 8.9999e-09 AU
q 2.274429345999296 9.6512e-08 AU
i 23.2646413333226 3.836e-06 deg
node 316.0453743580748 1.031e-05 deg
peri 266.8263840315538 1.4691e-05 deg
M 236.6533179773508 1.2575e-05 deg
tp 2457373.049834989902
(2015-Dec-16.54983499)
5.9132e-05 JED
period 1671.045683730001
4.58
8.1857e-06
2.241e-08
d
yr
n .2154339665905669 1.0553e-09 deg/d
Q 3.237325928875635 1.0572e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1501  
   data-arc span      54817 days (150.08 yr)  
   first obs. used      1864-01-14  
   last obs. used      2014-02-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53476  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:08:43  

Additional Information
 Earth MOID = 1.40547 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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]
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 2014-Jul-25 09:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin