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68410 Nichols (2001 QB154)
Classification: Main-belt Asteroid          SPK-ID: 2068410
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07690977348839798 3.6914e-08  
a 2.679855510089678 1.322e-08 au
q 2.473748429827046 9.8677e-08 au
i 4.859488372896695 4.3076e-06 deg
node 275.6844527386652 4.8985e-05 deg
peri 129.0180452512711 5.8255e-05 deg
M 56.02300413792678 3.0161e-05 deg
tp 2458751.138508054959
(2019-Sep-24.63850805)
0.0001341 TDB
period 1602.379923775663
4.39
1.1857e-05
3.246e-08
d
yr
n .2246658202954376 1.6625e-09 deg/d
Q 2.885962590352311 1.4237e-08 au
  Orbit Determination Parameters
   # obs. used (total)      804  
   data-arc span      8589 days (23.52 yr)  
   first obs. used      1996-07-19  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56565  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 15:33:22  

Additional Information
 Earth MOID = 1.48666 au 
 Jupiter MOID = 2.40652 au 
 T_jup = 3.368 
[ 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 15.3   n/a MPO453084  
diameter diameter 2.345 km 0.501 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.912 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.222   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

68410 Nichols           Discovered 2001 Aug. 16 by M. Collins and M. White at Anza.
Nichelle Nichols (b. 1936) is best known for her role as Lt. Nyota Uhura in the Star Trek series. She has also been a global ambassador for NASA, a recruiter of astronauts and an inspirer of millions as an author of science fiction. She stands undaunted in her belief that humankind must seek new knowledge.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1938-Mar-13 20:57 00:08 Iris 0.0465391574158689 0.0465270582080432 0.046551256626215 2.1529652518185 2.15296519444419 2428971.372912333 7.56372559505115 602.956028342983 57.932241081703 -2.23615225490855 12430.642744519 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 15:33:37 2020-Feb-23 15:33
2138-Oct-16 20:10 < 00:01 David 0.0382473497039204 0.0382368912054248 0.038257826941168 7.16182575254168 7.16182569739011 2502237.339969409 0.855432040349962 1435.00523479053 29.4635542069392 68.7059223632773 180889.930620564 T 21 CATAB v2.0f-lin.ifort 2020-Feb-23 15:33:37 2020-Feb-23 15:33
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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