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27031 (1998 RO4)
Classification: Amor [NEO]          SPK-ID: 2027031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4255076265735296 4.4444e-08  
a 2.139731535727996 4.0743e-09 au
q 1.229259448455843 9.4508e-08 au
i 5.354786349194916 5.6068e-06 deg
node 191.8833746766433 5.2218e-05 deg
peri 111.7655149878784 5.3145e-05 deg
M 358.8663498199969 9.9046e-06 deg
tp 2459004.100094646884
(2020-Jun-03.60009465)
3.1461e-05 TDB
period 1143.239859825764
3.13
3.2653e-06
8.94e-09
d
yr
n .3148945489486921 8.9938e-10 deg/d
Q 3.050203623000149 5.8079e-09 au
  Orbit Determination Parameters
   # obs. used (total)      276  
   data-arc span      25210 days (69.02 yr)  
   first obs. used      1951-08-26  
   last obs. used      2020-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53368  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-03 06:34:24  

Additional Information
 Earth MOID = .234811 au 
 Jupiter MOID = 2.25292 au 
 T_jup = 3.587 
[ 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 17.7   n/a MPO435951  

27031 (1998 RO4)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

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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
1901-Aug-03 07:44 < 00:01 Earth 0.287613826891287 0.287610266936336 0.287617386848329 3.03655551677379 3.0335031290046 2415599.822101939 0.587958816486792 181.70839666517 16.8341273183337 12.4445154221003 541690.814935513 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
1926-Jul-27 21:14 < 00:01 Earth 0.232720976634022 0.232720569902624 0.232721383367007 2.98857406018774 2.98474059583648 2424724.384905278 0.232386306976929 46.3266317193112 13.9872499164411 70.4861693716542 2756235.73411085 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
1951-Jul-23 19:49 < 00:01 Earth 0.260500158112097 0.260498821154109 0.260501495070915 3.36143911947907 3.35839490101998 2433851.325595534 0.20984104796291 70.9136858903475 18.4612510866499 -20.8099767974007 539167.119020068 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
1976-Jul-06 12:40 < 00:01 Earth 0.388940467805254 0.388939253914894 0.388941681695659 2.70292759383585 2.70039188973358 2442966.027572991 0.355362452442702 60.9134579273948 18.2410466607981 0.428646483739621 346354.182934593 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
1983-Jan-26 04:30 < 00:01 Mars 0.0725620055363283 0.0725614976067517 0.0725625134729953 7.46456504134356 7.46403646493066 2445360.687708159 0.192937392387681 57.7149598077748 18.3406998990652 71.3828181008839 573722.660740424 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
1998-Aug-16 04:44 < 00:01 Earth 0.374179056476104 0.374178386270701 0.374179726681614 2.85550863912142 2.85301381943218 2451041.697411965 0.15998091713042 35.4323664267239 18.4448569307374 22.2344814731507 1064391.43795621 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2023-Aug-01 16:03 < 00:01 Earth 0.250220810699486 0.250220184829134 0.250221436569995 2.98531717934033 2.98174808409541 2460158.168503801 0.0899223651276585 33.2681214119674 15.931773495121 23.0655580175605 1797183.45800878 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2048-Apr-15 23:39 < 00:01 Mars 0.0900348676423191 0.0900344448689664 0.0900352904200117 7.67503596099742 7.6746216497156 2469182.485430366 0.389704627243665 104.391144601461 20.0787804379761 86.4022464003402 671897.032630192 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2048-Jul-26 15:58 < 00:01 Earth 0.239690829493004 0.239690145625737 0.239691513361088 3.27477116471586 3.2713748709773 2469284.165339437 0.119806479434942 42.9053435249592 17.9239712211472 -42.0991733171578 667913.066378743 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2073-Jul-17 02:12 < 00:01 Earth 0.34229951375466 0.342296004965192 0.342303022544381 3.71037288496229 3.70827437348681 2478405.591512942 0.640667803823862 175.571340813616 18.4890611843275 -4.34332198878444 468390.433995612 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2095-Aug-24 14:05 00:01 Earth 0.416372273755576 0.416367652089054 0.416376895473955 2.51158525648404 2.50903606132835 2486479.086915559 1.06772474675567 327.631167858888 21.7219810348698 45.2883796791907 1098327.90543807 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2098-Jun-19 00:59 00:01 Earth 0.495848932330987 0.495844276235651 0.495853592475489 0.653578443484803 0.645304300476591 2487508.540634899 1.17467108368744 2265.1517563636 17.2100975311913 -84.8942322149552 246911.730658235 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2120-Aug-11 07:22 < 00:01 Earth 0.32161013184625 0.321605347148704 0.321614916545148 3.24317943280177 3.24062389212809 2495596.807289636 0.828204631431964 240.863684297505 17.2234638187383 7.68067042132737 559419.081672153 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2145-Aug-02 08:04 < 00:01 Earth 0.233696454105105 0.233695086494463 0.233697821722137 3.12864155820637 3.12499521472037 2504718.835868360 0.348378202989347 92.4068536571696 14.3528802014338 43.0450153502231 2540388.65252941 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2170-Jul-30 17:43 < 00:01 Earth 0.239316051948111 0.239313780020185 0.239318323887694 3.39980557295572 3.39652918167977 2513847.238512144 0.401216275812462 141.310509414986 18.2912896569471 -37.2384604963913 573361.871407546 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
2195-Jul-23 22:17 00:01 Earth 0.313643315910774 0.313635743969071 0.313650887856044 3.81534131854089 3.81311406475803 2522971.428483950 1.1103388928918 381.270482369998 18.8449876090068 -8.03174241142553 300819.898611644 T 74 CATAB v2.0f-lin.ifort 2020-Sep-03 06:34:29 2020-Sep-03 06:35
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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