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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3235786463358232 2.665e-08  
a 2.997155489033716 1.3952e-08 au
q 2.027339973034204 8.5116e-08 au
i 15.14696293978461 7.1333e-07 deg
node 262.6200019348789 4.2499e-06 deg
peri 100.9002033408927 5.8279e-06 deg
M 285.185286321196 4.35e-06 deg
tp 2459594.364515544430
(2022-Jan-14.86451554)
2.5031e-05 TDB
period 1895.231815024188
5.19
1.3234e-05
3.623e-08
d
yr
n .1899503781786216 1.3264e-09 deg/d
Q 3.966971005033229 1.8467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2478  
   data-arc span      37652 days (103.09 yr)  
   first obs. used      1917-07-22  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:34:31  

Additional Information
 Earth MOID = 1.0884 au 
 Jupiter MOID = 1.96391 au 
 T_jup = 3.122 
[ 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 11.37   n/a E2021B10  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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