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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398157959367499 7.8916e-09  
a 2.602600873387485 9.9495e-09 au
q 2.238716160769134 1.8183e-08 au
i 15.39341489704672 8.8606e-07 deg
node 79.49390418156543 4.7317e-06 deg
peri 332.0444779118054 1.0817e-05 deg
M 158.0781659039717 8.8546e-06 deg
tp 2458723.090604736885
(2019-Aug-27.59060474)
3.592e-05 TDB
period 1533.591820909597
4.20
8.7942e-06
2.408e-08
d
yr
n .2347430359836416 1.3461e-09 deg/d
Q 2.966485586005837 1.1341e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2880  
   data-arc span      22130 days (60.59 yr)  
   first obs. used      1960-11-22  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37189  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:04:15  

Additional Information
 Earth MOID = 1.26099 au 
 Jupiter MOID = 2.38457 au 
 T_jup = 3.350 
[ 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 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

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 ]
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