Astronomy:118401 LINEAR
From HandWiki
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery date | 7 September 1999 |
| Designations | |
| (118401) LINEAR | |
| Named after | LINEAR |
| 176P/LINEAR · 1999 RE70 | |
| Minor planet category | main-belt[1] · Themis MBC[2][3] |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) T jup = 3.166 | |
| Uncertainty parameter 0 | |
| Observation arc | 5808 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) | |
| Eccentricity | 0.19276 |
| Orbital period | 5.71 yr (2086.1 d) |
| Average Orbital speed | 16.51 km/s |
| Mean anomaly | 286.74° |
| Mean motion | 0.17257°/day |
| Inclination | 0.23477° |
| Longitude of ascending node | 345.96° |
| 35.460° | |
| Earth MOID | 1.58057 AU (236.450 Gm) |
| Jupiter MOID | 1.6475 AU (246.46 Gm) |
| Physical characteristics | |
| Dimensions | 4.0±0.4 km (Spitzer)[4] |
| Mass | 4.3×1013? kg[5] |
| Mean density | 1.3? g/cm3 (assumed) |
Equatorial surface gravity | <0.0017 m/s2 |
Equatorial escape velocity | <0.0032 km/s |
| Rotation period | ? d |
| Geometric albedo | 0.06±0.02R[4] |
| Physics | ~156 K |
| ? | |
| Apparent magnitude | 18.19 to 21.91 |
| Absolute magnitude (H) | 15.1[1] |
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery date | October 18, 2005 |
| Alternative designations | P/1999 RE70 |
| Orbital characteristics A | |
| Epoch | November 6, 2005 (JD 2453680.5) |
| Aphelion | 3.811678 AU |
| Perihelion | 2.5811186 AU |
| Semi-major axis | 3.19640 AU |
| Eccentricity | 0.1924908 |
| Orbital period | 5.714 a |
| Inclination | 0.23795° |
| Last perihelion | November 21, 2022[6] 2017 March 12[6] June 30, 2011[7] October 18, 2005 |
| Next perihelion | 2028-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
- ↑ 1.0 1.1 1.2 "JPL Small-Body Database Browser: 118401 LINEAR (1999 RE70)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=118401.
- ↑ 2.0 2.1 Henry H. Hsieh (May 2010). "Main Belt Comets". Hawaii. http://www.ifa.hawaii.edu/~hsieh/mbcs.shtml. (older 2010 site)
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedJewitt - ↑ 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.
- ↑ 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
- ↑ 6.0 6.1 6.2 "176P/LINEAR Orbit". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=176P.
- ↑ 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.
- ↑ "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)
- ↑ M.P.C. 133823
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs nameddualstatus
External links
- 118401 on November 13, 2011
- LINEAR home page
- Seiichi Yoshida's comet list
- New Class of Comets
- 118401 LINEAR at AstDyS-2, Asteroids—Dynamic Site
- 118401 LINEAR at the JPL Small-Body Database
| Numbered comets | ||
|---|---|---|
| Previous 175P/Hergenrother |
176P/LINEAR | Next 177P/Barnard |
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