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4892 Chrispollas (1985 TV2)
Classification: Main-belt Asteroid          SPK-ID: 2004892
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09938934775359418 6.8911e-09  
a 2.334832745165661 6.3997e-09 au
q 2.102775241509912 1.4861e-08 au
i 8.573436144461274 1.0336e-06 deg
node 211.6651295630679 3.7455e-06 deg
peri 308.0619087744521 1.2038e-05 deg
M 177.0121451881729 1.1301e-05 deg
tp 2458559.758793552688
(2019-Mar-17.25879355)
4.0448e-05 TDB
period 1303.113038237132
3.57
5.3577e-06
1.467e-08
d
yr
n .2762615286905675 1.1358e-09 deg/d
Q 2.56689024882141 7.0358e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2921  
   data-arc span      22014 days (60.27 yr)  
   first obs. used      1960-09-29  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37866  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:54:38  

Additional Information
 Earth MOID = 1.12112 au 
 Jupiter MOID = 2.43566 au 
 T_jup = 3.547 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457125.5 (2015-Apr-13.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09926448046941355 6.9163e-09  
q 2.103176974633372 1.4947e-08 au
tp 2457255.136452976015
(2015-Aug-20.63645298)
4.0089e-05 TDB
node 211.7875501106099 3.7434e-06 deg
peri 307.6331348100916 1.2089e-05 deg
i 8.573096285903363 1.0344e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2921  
   data-arc span      22014 days (60.27 yr)  
   first obs. used      1960-09-29  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37866  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:54:38  

Additional Information
 Jupiter MOID = 2.43566 au 
 T_jup = 3.547 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.783522563882711E-17 -9.673235762153638E-17 -7.287281115620341E-14 7.517851056107995E-15 -2.978458760518542E-14 1.390240142785967E-15
q -9.673235762153638E-17 2.233998446854945E-16 1.767980276837403E-13 -1.72754230065792E-14 7.109829454191627E-14 -3.105691465747637E-15
tp -7.287281115620341E-14 1.767980276837403E-13 1.607142361980528E-9 1.215585462046412E-11 4.59553041913536E-10 2.757310730231536E-12
node 7.517851056107995E-15 -1.72754230065792E-14 1.215585462046412E-11 1.40128411403281E-11 -1.060869044446585E-11 3.275540205429726E-12
peri -2.978458760518542E-14 7.109829454191627E-14 4.59553041913536E-10 -1.060869044446585E-11 1.461393702766908E-10 -2.651232097947647E-12
i 1.390240142785967E-15 -3.105691465747637E-15 2.757310730231536E-12 3.275540205429726E-12 -2.651232097947647E-12 1.06996029123631E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.92   n/a E2021B10  
diameter diameter 7.284 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 1584. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 46, 449-456.]
geometric albedo albedo 0.282   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4892 Chrispollas (1985 TV2)          Discovered 1985-Oct-11 by CERGA at Caussols
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1985 TV2 = 1964 WE = 1978 TT9 = 1981 RY = 1989 VB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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