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280 Philia (A888 UB)
Classification: Main-belt Asteroid          SPK-ID: 2000280
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1099392149003424 2.994e-08  
a 2.942017028710791 1.0329e-08 au
q 2.618573986350889 9.0644e-08 au
i 7.439296412517482 4.9099e-06 deg
node 9.865015147977857 2.4821e-05 deg
peri 89.45472554273776 3.3568e-05 deg
M 326.7484076272414 2.2501e-05 deg
tp 2459170.745698327377
(2020-Nov-17.24569833)
0.00011538 TDB
period 1843.173424923439
5.05
9.7064e-06
2.657e-08
d
yr
n .1953153160370427 1.0286e-09 deg/d
Q 3.265460071070694 1.1464e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2861  
   data-arc span      47654 days (130.47 yr)  
   first obs. used      1890-02-15  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45127  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:13:24  

Additional Information
 Earth MOID = 1.64865 au 
 Jupiter MOID = 1.90362 au 
 T_jup = 3.251 
[ 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 11.0   n/a MPO502155  
diameter diameter 45.69 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 70.26 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V.; Ferrero, A.; Hamanowa, H.; Hamanowa, H.; Stephens, R.D. (2011) Minor Planet Bull. 38, 127-128.]
geometric albedo albedo 0.0444   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV 0.650   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.44 deg.
U-B UB 0.220   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.44 deg.

280 Philia (A888 UB)          Discovered 1888-Oct-29 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Dec-04 04:42 00:02 Jupiter 1.92362228057603 1.92362189677715 1.92362266437491 3.18983524284047 3.04867105490087 2416087.696082863 1.77408612626784 64.9109454130346 14.2824586309497 89.7714505529194 2669539.11680385 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
1938-Jan-23 16:24 00:01 Jupiter 1.93588486454449 1.93588448595112 1.93588524313786 2.87662942687034 2.720279683779 2428922.183524293 1.22588809001992 48.2936997833982 15.9641796817644 83.5706432502537 3046427.70630494 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
1973-Mar-13 12:29 < 00:01 Jupiter 1.96527979829409 1.96527941456124 1.96528018202694 2.65073699969492 2.48282499380051 2441755.019815107 0.677727848477963 47.0845464567161 11.4733288047226 76.4819078560102 3781823.62554362 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
2070-Jan-29 04:03 < 00:01 Jupiter 1.99664013959686 1.99663969012656 1.99664058906716 4.02446381305101 3.91763463502941 2477140.668521265 0.875122997116207 62.4912824391394 19.1291786636885 88.4477798128288 3363427.97971461 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
2105-Mar-26 08:08 00:01 Jupiter 1.94447685768826 1.94447641223396 1.94447730314278 3.67379278478376 3.55324426252547 2489979.839207250 1.42230900836296 82.8311601282436 16.5912692003647 86.3147130073534 3116303.5150598 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
2140-May-21 00:36 00:02 Jupiter 1.90683839717195 1.9068380170994 1.90683877724449 3.32140962801281 3.18486369847818 2502819.524940360 1.99813313041008 81.2428856090727 14.3515912747542 -89.5590983314047 2816110.67438927 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
2175-Jul-14 14:21 00:03 Jupiter 1.91367302831374 1.91367261923081 1.91367343739668 3.03349014127624 2.88389150503715 2515657.097782376 2.61325219046052 57.6407128988248 23.5454288503768 -81.471889563001 2520211.23637881 T 40 CATAB v2.0f-lin.ifort 2020-Aug-24 22:13:42 2020-Aug-24 22:13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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