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15257 (1990 RQ8)
Classification: Main-belt Asteroid          SPK-ID: 2015257
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .172779037797425 5.1642e-08  
a 3.138609720314418 1.6571e-08 au
q 2.596323752816847 1.613e-07 au
i 1.279413543817399 5.2038e-06 deg
node 7.882672020622127 0.00016709 deg
peri 326.0146406228189 0.00016742 deg
M 171.3801834454741 1.309e-05 deg
tp 2458233.642428378269
(2018-Apr-25.14242838)
7.1399e-05 TDB
period 2030.97416974445
5.56
1.6085e-05
4.404e-08
d
yr
n .1772548392603622 1.4038e-09 deg/d
Q 3.680895687811988 1.9434e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1454  
   data-arc span      11143 days (30.51 yr)  
   first obs. used      1990-09-15  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52131  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:00:01  

Additional Information
 Earth MOID = 1.5845 au 
 Jupiter MOID = 1.69321 au 
 T_jup = 3.187 
[ 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 14.03   n/a E2021B10  
diameter diameter 8.433 km 0.313 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.67 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.075   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15257 (1990 RQ8)          Discovered 1990-Sep-15 by Debehogne, H. at La Silla
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ 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
1921-Nov-29 11:41 00:02 Jupiter 1.93745006335 1.93744893308412 1.93745119361543 2.30701273790432 2.10901384992054 2423022.986750321 2.1623272787181 78.798341364538 14.2539370738494 -82.3808523142028 1415691.65486016 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
1932-Mar-14 06:47 00:02 Jupiter 1.67172308476646 1.67172254161049 1.67172362792195 1.54291570751319 1.16928877012966 2426780.782463711 1.91304135163149 154.550601906381 83.3763163541632 -61.7200112757734 1861658.78391472 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
1942-Jun-17 22:14 00:02 Jupiter 1.78497818191 1.78497752795055 1.78497883586903 2.29097294140958 2.07352371279854 2430528.426583503 1.68207041150726 52.2147922561458 7.12630606007312 -86.8318582819866 1511298.44625913 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2005-Jan-05 07:25 < 00:01 Jupiter 1.93159848548015 1.93159796732077 1.93159900363941 2.27581676586155 2.0742046161286 2453375.808851683 0.32958951263335 51.5632363458712 6.46059354780222 87.038461797007 2280554.26757815 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2015-Apr-21 22:33 < 00:01 Jupiter 1.68106149467659 1.68106102214817 1.68106196720568 1.56046276311678 1.19470524600065 2457134.439317474 0.196771464035823 127.003834230216 64.796266090162 -49.6794074467121 2305664.65377418 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2025-Jul-26 08:11 < 00:01 Jupiter 1.80099517947301 1.80099482302741 1.80099553591851 2.33923857644373 2.12871347050194 2460882.841263339 0.355121495386388 51.3740386935806 5.85988123268912 -86.7218581639336 3213509.28174963 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2088-Feb-12 20:33 00:02 Jupiter 1.92213909237805 1.92213831347826 1.9221398712775 2.23563777528627 2.02897586215643 2483729.356081198 1.648677321432 67.3240154357466 7.77763461073959 -88.7458914767563 1623144.80345118 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2098-May-29 19:42 00:02 Jupiter 1.6824437167289 1.68244323075077 1.68244420270694 1.55813867747065 1.19201536457565 2487488.321120884 1.9338231788202 153.50830724221 79.4475702030534 -64.8604700786306 1953352.54222978 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2108-Sep-03 07:03 00:02 Jupiter 1.8091264721301 1.80912564916864 1.80912729509105 2.37015553563167 2.16361939221024 2491236.793501841 2.25381506728902 50.9421386755952 6.3453592381497 -86.95760728839 1272522.11580957 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2171-Mar-23 02:08 00:04 Jupiter 1.9132324389363 1.91323097596664 1.91323390190552 2.19607966084738 1.9842705967894 2514082.588958832 3.5352126419526 103.866800481698 8.74856011563248 -85.860724340837 1266349.70657164 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2181-Jul-06 08:30 00:04 Jupiter 1.68780994324978 1.68780941396458 1.6878104725345 1.56636402768281 1.20407727496786 2517840.853874962 3.82347554387334 230.293358578241 83.2602870317883 -77.3606206196923 1825628.52536146 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00
2191-Oct-13 20:05 00:04 Jupiter 1.82127873414738 1.821277327847 1.8212801404462 2.4074752568769 2.20585508635038 2521592.336489794 4.17107174083466 50.0105990022761 8.12697356204581 -86.9188720884221 728860.505768293 T 30 CATAB v2.0g-lin.ifort 2021-May-04 02:00:10 2021-May-04 02:00

Alternate Designations
 1990 RQ8 = 1994 GE3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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