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169 Zelia
Classification: Main-belt Asteroid          SPK-ID: 2000169
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1309569251957946 3.5846e-08  
a 2.357742690657822 7.804e-09 AU
q 2.048979957486414 8.4195e-08 AU
i 5.500294719763465 4.8617e-06 deg
node 354.7832206431923 4.7615e-05 deg
peri 334.3781434622974 5.1228e-05 deg
M 86.96863133256447 1.947e-05 deg
tp 2456681.049794198260
(2014-Jan-23.54979420)
7.1085e-05 JED
period 1322.339702563136
3.62
6.5653e-06
1.797e-08
d
yr
n .2722447184352098 1.3517e-09 deg/d
Q 2.666505423829229 8.826e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1331  
   data-arc span      47411 days (129.80 yr)  
   first obs. used      1885-01-09  
   last obs. used      2014-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57939  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 12:41:15  

Additional Information
 Earth MOID = 1.0404 AU 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.56 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
diameter diameter 33.60 km 2.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 14.537 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Stephens, R.D.; Pilcher, F. (2009) Minor Planet Bul. 36, 161.]
geometric albedo albedo 0.2347   0.041 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV .848 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=.93 deg.
U-B UB .458 mag .026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=.93 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Sl   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

169 Zelia          Discovered 1876-Sep-28 by Henry, Prosper at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1933 FC2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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