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JPL Small-Body Database Browser
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880 Herba (A917 OC)
Classification: Main-belt Asteroid          SPK-ID: 2000880
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3235257097889372 4.0177e-08  
a 2.996495554404081 1.4756e-08 au
q 2.027052203286106 1.2408e-07 au
i 15.14783097533229 4.2249e-06 deg
node 262.6188896086448 1.6705e-05 deg
peri 100.9418930910478 1.7439e-05 deg
M 247.1295190223576 6.6666e-06 deg
tp 2459594.514106186220
(2022-Jan-15.01410619)
3.7808e-05 TDB
period 1894.605891414584
5.19
1.3995e-05
3.832e-08
d
yr
n .1900131323518742 1.4036e-09 deg/d
Q 3.965938905522056 1.953e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2045  
   data-arc span      37183 days (101.80 yr)  
   first obs. used      1917-07-22  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41713  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:15:27  

Additional Information
 Earth MOID = 1.08945 au 
 Jupiter MOID = 1.96335 au 
 T_jup = 3.123 
[ 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 11.3   n/a MPO473774  
diameter diameter 32.329 km 0.414 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.266 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2007) Minor Planet Bull. 34, 32-37.]
[Pilcher, F. (2012) Minor Planet Bull. 39, 57-60.]
geometric albedo albedo 0.049   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.634   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=15.00 deg.
U-B UB 0.301   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=15.00 deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

880 Herba (A917 OC)          Discovered 1917-Jul-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A917 OC = 1954 YC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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