(385343) 2002 LV

(385343) 2002 LV, provisional designation 2002 LV, is a stony asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.5 kilometers (0.9 miles) in diameter. It was discovered on 1 June 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States.[1] The Sr-type asteroid has a rotation period of 6.2 hours and is likely elongated.[4]

(385343) 2002 LV

Discovery [1]
Discovered by	LINEAR
Discovery site	Lincoln Lab's ETS
Discovery date	1 June 2002
Designations
MPC designation	(385343) 2002 LV
Alternative designations	2002 LV
Minor planet category	Apollo · NEO · PHA [1][2]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	14.74 yr (5,382 d)
Aphelion	3.7146 AU
Perihelion	0.9138 AU
Semi-major axis	2.3142 AU
Eccentricity	0.6051
Orbital period	3.52 yr (1,286 d)
Mean anomaly	148.86°
Mean motion	0° 16^m 48^s / day
Inclination	29.541°
Longitude of ascending node	132.20°
Argument of perihelion	224.20°
Earth MOID	0.0071 AU (2.766 LD)
Physical characteristics
Mean diameter	1.359±0.555 km[3] 1.42 km (calculated)[4] 1.73 km[5]
Rotation period	6.195±0.012 h[lower-alpha 1] 6.20±0.01 h[6][7]
Geometric albedo	0.15[5] 0.20 (assumed)[4] 0.2158±0.4209[3]
Spectral type	Sr [8] · S (assumed)[4]
Absolute magnitude (H)	16.5[5] 16.60[2][4][3]

Orbit and classification

2002 LV is a member of the Earth-crossing group of Apollo asteroids, the largest group of near-Earth objects with approximately 10 thousand known members.[1][2]

It orbits the Sun at a distance of 0.9–3.7 AU once every 3 years and 6 months (1,286 days; semi-major axis of 2.31 AU). Its orbit has an eccentricity of 0.61 and an inclination of 30° with respect to the ecliptic.[2] Due to its large aphelion, it also crosses the orbit of Mars at 1.66 AU.[2] The body's observation arc begins with its official discovery observation at Socorro in June 2002.[1]

Close approaches

The asteroid has an Earth minimum orbital intersection distance of 0.0071 AU (1,060,000 km; 660,000 mi), which corresponds to 2.7 lunar distances and makes it a potentially hazardous asteroid due to its notably large size.[2] In August 1935, it approached Earth at a nominal distance of 0.035 AU (14 LD), and in July 2002 at 0.112 AU (44 LD). Its closest near-Earth encounter is predicted to occur on 4 August 2076 at a distance of 0.0108 AU (4.2 LD) only (see table).[9]

History of close approaches of large near-Earth objects since 1908 ^(A)

PHA	Date	Approach distance (lunar dist.)			Abs. mag (H)	Diameter ^(C) (m)	Ref ^(D)
		Nomi- nal^(B)	Mini- mum	Maxi- mum
(33342) 1998 WT24	1908-12-16	3.542	3.537	3.547	17.9	556–1795	data
(458732) 2011 MD5	1918-09-17	0.911	0.909	0.913	17.9	556–1795	data
(7482) 1994 PC1	1933-01-17	2.927	2.927	2.928	16.8	749–1357	data
69230 Hermes	1937-10-30	1.926	1.926	1.927	17.5	668–2158	data
69230 Hermes	1942-04-26	1.651	1.651	1.651	17.5	668–2158	data
(137108) 1999 AN10	1946-08-07	2.432	2.429	2.435	17.9	556–1795	data
(33342) 1998 WT24	1956-12-16	3.523	3.523	3.523	17.9	556–1795	data
(163243) 2002 FB3	1961-04-12	4.903	4.900	4.906	16.4	1669–1695	data
(192642) 1999 RD32	1969-08-27	3.627	3.625	3.630	16.3	1161–3750	data
(143651) 2003 QO104	1981-05-18	2.761	2.760	2.761	16.0	1333–4306	data
2017 CH1	1992-06-05	4.691	3.391	6.037	17.9	556–1795	data
(170086) 2002 XR14	1995-06-24	4.259	4.259	4.260	18.0	531–1714	data
(33342) 1998 WT24	2001-12-16	4.859	4.859	4.859	17.9	556–1795	data
4179 Toutatis	2004-09-29	4.031	4.031	4.031	15.30	2440–2450	data
2014 JO25	2017-04-19	4.573	4.573	4.573	17.8	582–1879	data
(137108) 1999 AN10	2027-08-07	1.014	1.010	1.019	17.9	556–1795	data
(35396) 1997 XF11	2028-10-26	2.417	2.417	2.418	16.9	881–2845	data
(154276) 2002 SY50	2071-10-30	3.415	3.412	3.418	17.6	714–1406	data
(164121) 2003 YT1	2073-04-29	4.409	4.409	4.409	16.2	1167–2267	data
(385343) 2002 LV	2076-08-04	4.184	4.183	4.185	16.6	1011–3266	data
(52768) 1998 OR2	2079-04-16	4.611	4.611	4.612	15.8	1462–4721	data
(33342) 1998 WT24	2099-12-18	4.919	4.919	4.919	17.9	556–1795	data
(85182) 1991 AQ	2130-01-27	4.140	4.139	4.141	17.1	1100	data
314082 Dryope	2186-07-16	3.709	2.996	4.786	17.5	668–2158	data
(137126) 1999 CF9	2192-08-21	4.970	4.967	4.973	18.0	531–1714	data
(290772) 2005 VC	2198-05-05	1.951	1.791	2.134	17.6	638–2061	data
^(A) List includes near-Earth approaches of less than 5 lunar distances (LD) of objects with H brighter than 18. ^(B) Nominal geocentric distance from the Earth's center to the object's center (earth radius≈6400 km). ^(C) Diameter: estimated, theoretical mean-diameter based on H and albedo range between X and Y. ^(D) Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD) ^(E) Color codes:   unobserved at close approach   observed during close approach   upcoming approaches

Physical characteristics

Observations with the Spitzer Telescope characterized this object as an Sr-subtype that transitions from the common, stony S-type asteroids to the uncommon R-types.[8]

Rotation period

In July 2002, a rotational lightcurve of this asteroid was obtained from photometric observations by Petr Pravec at Ondřejov Observatory in the Czech Republic. Lightcurve analysis gave a well-defined rotation period of 6.195 hours with a high brightness amplitude of 0.93 magnitude, indicative for an elongated, non-spherical shape (U=3).[lower-alpha 1] The result agrees with a period of 6.2 hours measured at the Table Mountain Observatory and at the CS3-Palmer Divide Station (U82) in 2009 and 2016, respectively (U=2+/3-).[6][7]

Diameter and albedo

According to post-cryogenic observations with the Spitzer Telescope during the ExploreNEOs survey, and observations carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, this asteroid measures between 1.359 and 1.73 kilometers in diameter and its surface has an albedo between 0.15 and 0.2158.[3][5] The Collaborative Asteroid Lightcurve Link assumes a stony standard albedo of 0.20 and calculates a diameter of 1.42 kilometers based on an absolute magnitude of 16.6.[4]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 14 February 2014 (M.P.C. 87072).[10] As of 2018, it has not been named.[1]

Notes

1. Lightcurve by Pravec on 22 July 2002: rotation period 6.195±0.012 hours with a brightness amplitude of 0.94 mag. Quality code of 3. Summary figures for (385343) 2002 LV at the LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2002) (see data).

References

1. "385343 (2002 LV)". Minor Planet Center. Retrieved 20 April 2018.
2. "JPL Small-Body Database Browser: 385343 (2002 LV)" (2017-02-24 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2018.
3. Masiero, Joseph R.; Nugent, C.; Mainzer, A. K.; Wright, E. L.; Bauer, J. M.; Cutri, R. M.; et al. (October 2017). "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos". The Astronomical Journal. 154 (4): 10. arXiv:1708.09504. Bibcode:2017AJ....154..168M. doi:10.3847/1538-3881/aa89ec. S2CID 45334910.
4. "LCDB Data for (385343)". Asteroid Lightcurve Database (LCDB). Retrieved 20 April 2018.
5. Trilling, D. E.; Mueller, M.; Hora, J. L.; Harris, A. W.; Bhattacharya, B.; Bottke, W. F.; et al. (September 2010). "ExploreNEOs. I. Description and First Results from the Warm Spitzer Near-Earth Object Survey" (PDF). The Astronomical Journal. 140 (3): 770–784. Bibcode:2010AJ....140..770T. doi:10.1088/0004-6256/140/3/770.
6. Hicks, M.; Rhoades, H.; Somers, J.; Grote, M. (July 2009). "Broad-Band Photometry of the Potenially Hazardous Asteroid 2002 LV". The Astronomer's Telegram. 2134 (2134): 1. Bibcode:2009ATel.2134....1H.
7. Warner, Brian D. (January 2017). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 July-September". The Minor Planet Bulletin. 44 (1): 22–36. Bibcode:2017MPBu...44...22W. ISSN 1052-8091. PMC 7243971. PMID 32455389.
8. Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects". Icarus. 228: 217–246. arXiv:1310.2000. Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. S2CID 119278697.
9. "JPL Small-Body Database Browser: 385343 (2002 LV)". Jet Propulsion Laboratory. Retrieved 20 April 2018.
10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 April 2018.

External links

• List of the Potentially Hazardous Asteroids (PHAs), Minor Planet Center
• PHA Close Approaches To The Earth, Minor Planet Center
• Asteroid Lightcurve Database (LCDB), query form (info)
• (385343) 2002 LV at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• (385343) 2002 LV at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• (385343) 2002 LV at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters