Astronomy:2000 YH2
| Discovery[1] | |
|---|---|
| Discovered by |
|
| Discovery date | 17 December 2000 |
| Designations | |
| 2000 YH2 | |
| Minor planet category | |
| Orbital characteristics[4] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 2866 days (7.85 yr) |
| |{{{apsis}}}|helion}} | 51.297 astronomical unit|AU (7.6739 Tm) (Q) |
| |{{{apsis}}}|helion}} | 27.430 AU (4.1035 Tm) (q) |
| 39.364 AU (5.8888 Tm) (a) | |
| Eccentricity | 0.30316 (e) |
| Orbital period | 246.98 yr (90208.1 d) |
| Mean anomaly | 2.5396° (M) |
| Mean motion | 0° 0m 14.367s /day (n) |
| Inclination | 12.918° (i) |
| Longitude of ascending node | 219.48° (Ω) |
| 233.11° (ω) | |
| Earth MOID | 26.4631 AU (3.95882 Tm) |
| Jupiter MOID | 22.3854 AU (3.34881 Tm) |
| Physical characteristics | |
| Dimensions | |
| Apparent magnitude | ~22.8[8] |
| Absolute magnitude (H) | 8.0[4] |
2000 YH2, also written as 2000 YH2, is a trans-Neptunian object. It is a plutino in a 2:3 resonance with Neptune.[2][3]
Pluto-like orbit
2000 YH2 is currently 27.4 AU from the Sun,[8] and came to perihelion in March 2014.[4] This means that this plutino is currently inside the orbit of the planet Neptune. Like Pluto, this plutino spends part of its orbit closer to the Sun than Neptune even though their orbits are controlled by Neptune. Simulations by the Deep Ecliptic Survey (DES) show that over the next 10 million years 2000 YH2 may acquire a perihelion distance (qmin) as small as 26.7 AU.[3]
It has only been observed 25 times over seven years and has an orbit quality of 4 (fairly average).[4]
Assuming a generic trans-Neptunian albedo of 0.09, 2000 YH2 is about 122 km in diameter.[6] But since the true albedo is unknown and it has an absolute magnitude (H) of 7.8,[4] it could easily be from about 73 to 163 km in diameter.[5]
References
- ↑ "MPEC 2000-Y19: 2000 YB2, 2000 YC2, 2000 YD2, 2000 YE2, 2000 YF2, 2000 YG2, 2000 YH2". IAU Minor Planet Center. 20 December 2000. http://www.minorplanetcenter.org/mpec/K00/K00Y19.html. Retrieved 17 February 2010.
- ↑ 2.0 2.1 "MPEC 2010-B62 :Distant Minor Planets (13 February 2010.0 TT)". Minor Planet Center. 30 January 2010. http://www.minorplanetcenter.org/mpec/K10/K10B62.html. Retrieved 17 February 2010.
- ↑ 3.0 3.1 3.2 Marc W. Buie. "Orbit Fit and Astrometric record for 00YH2". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/00YH2.html. Retrieved 12 October 2014.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 "JPL Small-Body Database Browser: (2000 YH2)". http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000YH2. Retrieved 30 March 2016.
- ↑ 5.0 5.1 "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 26 November 2009. https://web.archive.org/web/20091126011612/http://neo.jpl.nasa.gov/glossary/h.html. Retrieved 6 December 2009.
- ↑ 6.0 6.1 Dan Bruton. "Conversion of Absolute Magnitude to Diameter for Minor Planets". Department of Physics & Astronomy (Stephen F. Austin State University). Archived from the original on 10 December 2008. https://web.archive.org/web/20081210190134/http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html. Retrieved 9 December 2008.
- ↑ Assuming an albedo of 0.09
- ↑ 8.0 8.1 "AstDys 2000YH2 Ephemerides". Department of Mathematics, University of Pisa, Italy. https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=2000YH2. Retrieved 31 March 2014.
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