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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
91416 (1999 NH55)
Classification: Main-belt Asteroid          SPK-ID: 2091416
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1404523331069621 3.4899e-08  
a 2.625119236405986 1.6059e-08 au
q 2.256415114968799 9.2063e-08 au
i 11.90445803501191 4.0341e-06 deg
node 250.3268083292834 2.6864e-05 deg
peri 4.236234779102388 3.3264e-05 deg
M 105.3193618308499 2.0573e-05 deg
tp 2458942.006478917268
(2020-Apr-02.50647892)
8.7853e-05 TDB
period 1553.538349886365
4.25
1.4255e-05
3.903e-08
d
yr
n .2317290719127291 2.1264e-09 deg/d
Q 2.993823357843174 1.8314e-08 au
  Orbit Determination Parameters
   # obs. used (total)      926  
   data-arc span      7768 days (21.27 yr)  
   first obs. used      1999-07-12  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55777  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:31  

Additional Information
 Earth MOID = 1.24215 au 
 Jupiter MOID = 2.05709 au 
 T_jup = 3.358 
[ 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 14.76   n/a E2021B10  
rotation period rot_per 22.9119 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

91416 (1999 NH55)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 NH55 = 2000 VY55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-27 11:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin