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2904 Millman (1981 YB)
Classification: Main-belt Asteroid          SPK-ID: 2002904
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396546636666455 7.9289e-09  
a 2.60309672292454 1.0558e-08 au
q 2.239562125592766 1.8701e-08 au
i 15.39274219667933 9.1316e-07 deg
node 79.498847145437 4.8417e-06 deg
peri 332.0948833461179 1.2063e-05 deg
M 112.0194424317789 9.2713e-06 deg
tp 2458723.163338941764
(2019-Aug-27.66333894)		 3.8679e-05 TDB
period 1534.030113438729
4.20		 9.3332e-06
2.555e-08		 d
yr
n .2346759668185476 1.4278e-09 deg/d
Q 2.966631320256314 1.2033e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2523  
   data-arc span      22028 days (60.31 yr)  
   first obs. used      1960-11-22  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39125  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:26:49  

Additional Information
 Earth MOID = 1.26149 au 
 Jupiter MOID = 2.38328 au 
 T_jup = 3.349 
[ 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 11.85   n/a E2021B10  
diameter diameter 15.460 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.6603 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Benishek, V. (2016) Minor Planet Bull. 43, 339-342.]
geometric albedo albedo 0.169   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2904 Millman (1981 YB)          Discovered 1981-Dec-20 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 YB = 1939 VF = 1939 XG = 1960 WO = 1960 XB = 1981 WK9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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