Astronomy:118401 LINEAR

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118401 LINEAR
176P/LINEAR
File:Gemini North (GMOS) imaging of Asteroid 118401 (geminiann06008a).jpg
Discovery
Discovered byLINEAR
Discovery date7 September 1999
Designations
(118401) LINEAR
Named afterLINEAR
176P/LINEAR · 1999 RE70
Minor planet categorymain-belt[1] · Themis
MBC[2][3]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
T jup = 3.166
Uncertainty parameter 0
Observation arc5808 days (15.90 yr)
|{{{apsis}}}|helion}}3.8110 astronomical unit|AU (570.12 Gm)
|{{{apsis}}}|helion}}2.5793 AU (385.86 Gm)
3.1951 AU (477.98 Gm)
Eccentricity0.19276
Orbital period5.71 yr (2086.1 d)
Average Orbital speed16.51 km/s
Mean anomaly286.74°
Mean motion0.17257°/day
Inclination0.23477°
Longitude of ascending node345.96°
35.460°
Earth MOID1.58057 AU (236.450 Gm)
Jupiter MOID1.6475 AU (246.46 Gm)
Physical characteristics
Dimensions4.0±0.4 km (Spitzer)[4]
Mass4.3×1013? kg[5]
Mean density1.3? g/cm3 (assumed)
Equatorial surface gravity
<0.0017 m/s2
Equatorial escape velocity
<0.0032 km/s
Rotation period? d
Geometric albedo0.06±0.02R[4]
Physics~156 K
?
Apparent magnitude18.19 to 21.91
Absolute magnitude (H)15.1[1]


176P/LINEAR
Discovery
Discovered byLINEAR
Discovery dateOctober 18, 2005
Alternative
designations		P/1999 RE70
Orbital characteristics A
EpochNovember 6, 2005 (JD 2453680.5)
Aphelion3.811678 AU
Perihelion2.5811186 AU
Semi-major axis3.19640 AU
Eccentricity0.1924908
Orbital period5.714 a
Inclination0.23795°
Last perihelionNovember 21, 2022[6]
2017 March 12[6]
June 30, 2011[7]
October 18, 2005
Next perihelion2028-Aug-05[8]

118401 LINEAR (provisional designation 1999 RE70, comet designation 176P/LINEAR) is an active asteroid and main-belt comet[2]Cite error: Closing </ref> missing for <ref> tag and (248370) 2005 QN173 (433P/2005 QN173).[9] As a dual-status object, astrometric observations of 118401 LINEAR should be reported under the minor planet designation.[10]

118401 LINEAR last came to perihelion on 2017 March 12.[6]

References

  1. ↑ 1.0 1.1 1.2 "JPL Small-Body Database Browser: 118401 LINEAR (1999 RE70)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=118401. 
  2. ↑ 2.0 2.1 Henry H. Hsieh (May 2010). "Main Belt Comets". Hawaii. http://www.ifa.hawaii.edu/~hsieh/mbcs.shtml.  (older 2010 site)
  3. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Jewitt
  4. ↑ 4.0 4.1 Hsieh, Henry H.; Jewitt, David C.; Fernández, Yanga R. (2009). "Albedos of Main-Belt Comets 133P/ELST-PIZARRO and 176P/LINEAR". The Astrophysical Journal Letters 694 (2): L111–L114. doi:10.1088/0004-637X/694/2/L111. Bibcode: 2009ApJ...694L.111H. 
  5. ↑ Using a spherical radius of 2 km; volume of a sphere * an assumed density of 1.3 g/cm3 yields a mass (m=d*v) of 4.3E+13 kg
  6. ↑ 6.0 6.1 6.2 "176P/LINEAR Orbit". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=176P. 
  7. ↑ Syuichi Nakano (2006-10-29). "176P/LINEAR = (118401) 1999 RE70 (NK 1373)". OAA Computing and Minor Planet Sections. http://www.oaa.gr.jp/~oaacs/nk/nk1373.htm. 
  8. ↑ "Horizons Batch for 118401 LINEAR (1999 RE70 on 2028-Aug-05". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27118401%27&START_TIME=%272028-Aug-05%27&STOP_TIME=%272028-Aug-07%27&STEP_SIZE=%271%20hour%27&QUANTITIES=%2719%27. Retrieved 2023-05-01.  (JPL#73/Soln.date: 2023-Apr-27)
  9. ↑ M.P.C. 133823
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named dualstatus
Numbered comets
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