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4875 Ingalls (1991 DJ)
Classification: Main-belt Asteroid          SPK-ID: 2004875
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1786056689385525 1.0319e-08  
a 2.243787441220237 6.2089e-09 au
q 1.843034284325173 2.2842e-08 au
i 5.255994601419009 2.4644e-07 deg
node 123.8295316485836 1.6409e-06 deg
peri 159.4821254492774 5.7756e-06 deg
M 266.8419417663418 4.9715e-06 deg
tp 2459714.179304355580
(2022-May-14.67930436)
1.7699e-05 TDB
period 1227.639902939592
3.36
5.0956e-06
1.395e-08
d
yr
n .2932456000639745 1.2172e-09 deg/d
Q 2.644540598115301 7.3178e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3015  
   data-arc span      32893 days (90.06 yr)  
   first obs. used      1931-05-21  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45135  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:30:23  

Additional Information
 Earth MOID = .827403 au 
 Jupiter MOID = 2.50323 au 
 T_jup = 3.606 
[ 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 13.12   n/a MPO614063  
diameter diameter 5.504 km 0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.7783 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
[Benishek, V. (2020) Minor Planet Bull. 47, 231-241.]
geometric albedo albedo 0.368   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4875 Ingalls (1991 DJ)          Discovered 1991-Feb-19 by Kushida, Y. and R. at Yatsugatake
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 DJ = 1931 KH = 1948 NG = 1948 OD = 1975 RZ1 = 1978 JY2 = 1979 YX3 = 1985 MG = 1988 JJ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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