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4831 Baldwin (1988 RX11)
Classification: Main-belt Asteroid          SPK-ID: 2004831
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1175619052297766 3.6948e-08  
a 3.09295671511278 1.5642e-08 au
q 2.72934283089089 1.1579e-07 au
i .2637756221464265 3.8186e-06 deg
node 65.93552797771734 0.00078317 deg
peri 145.9679067980699 0.00078329 deg
M 98.2210814346154 1.3609e-05 deg
tp 2458658.422475590237
(2019-Jun-23.92247559)
7.5341e-05 TDB
period 1986.82305200867
5.44
1.5072e-05
4.126e-08
d
yr
n .1811937905773952 1.3745e-09 deg/d
Q 3.45657059933467 1.7481e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2536  
   data-arc span      25214 days (69.03 yr)  
   first obs. used      1951-12-01  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48256  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:49:52  

Additional Information
 Earth MOID = 1.72249 au 
 Jupiter MOID = 1.50747 au 
 T_jup = 3.214 
[ 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 12.53   n/a E2021B10  
diameter diameter 18.381 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.00 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
geometric albedo albedo 0.057   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4831 Baldwin           Discovered 1988 Sept. 14 by S. J. Bus at Cerro Tololo.
Through his pioneering work on the impact origins of lunar craters, Ralph Baldwin (b. 1912) recognized the importance of impacts in the moon's geologic history. Baldwin's contributions to lunar science were published in his books The Face of the Moon (1949) and The Measure of the Moon (1963).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1988 RX11 = 1970 GK1 = 1975 ET 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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