.gif) Radar image of2014 JO25 taken at Goldstone on 19 Apr 2017 | |
| Discovery[1] | |
|---|---|
| Discovered by | Mount Lemmon Srvy. |
| Discovery site | Mount Lemmon Obs. (first observation only) |
| Discovery date | 5 May 2014 |
| Designations | |
| 2014 JO25 | |
| NEO · Apollo · PHA[1][2] | |
| Orbital characteristics[1] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 6.02 yr (2,200 days) |
| Aphelion | 3.8996AU |
| Perihelion | 0.2364 AU |
| 2.0680 AU | |
| Eccentricity | 0.8857 |
| 2.97yr (1,086 days) | |
| 125.06° | |
| 0° 19m 53.04s / day | |
| Inclination | 25.261° |
| 30.637° | |
| 49.571° | |
| Earth MOID | 0.0110 AU (4.3LD) |
| Mercury MOID | 0.0210 AU[2] |
| Venus MOID | 0.0412 AU[2] |
| Physical characteristics | |
| 0.72 km(est. at0.20)[3] 0.818 km(calculated)[4] | |
| 4.531 h[4] | |
| 0.20(assumed)[4] | |
| S(assumed)[4] | |
| 17.8[2][4][1] | |
(671294) 2014 JO25 is anear-Earth asteroid. It was discovered in May 2014 by astronomers at theCatalina Sky Survey near Tucson, Arizona - a project of NASA's NEO (Near Earth Object) Observations Program in collaboration with the University of Arizona.
2014 JO25 belongs to theApollo asteroids, whichcross the orbit of Earth. Apollos are the largest group ofnear-Earth objects with nearly 10 thousand known members. It is also apotentially hazardous asteroid due to its sufficiently large size (anabsolute magnitude brighter than 22), and its Earth-MOID(see below) of less than 0.05 AU.
It orbits the Sun at a distance of 0.25–3.90 AU once every 3 years (1,086 days;semi-major axis of 2.07 AU). Its orbit has aneccentricity of 0.89 and aninclination of 25° with respect to theecliptic.[1] This makes it also aVenus- andMercury-crossing asteroid.
The body'sobservation arc begins with aprecovery taken byPan-STARRS in May 2011, or 3 years prior to its official first observation at Mount Lemmon.[2]
This asteroid has aminimum orbital intersection distance (MOID) with Earth of 1,650,000 km; 1,020,000 mi (0.0110 AU), which translates into 4.3lunar distances.[1]
2014 JO25 made a close flyby of Earth on 19 April 2017, and at its closest approach on that date came within 1.8 million kilometers (1.1 million miles) of the planet. It reached anapparent magnitude of 10.76.
The 2017-flyby within a distance of 1.8 million kilometers was the closest approach to Earth by2014 JO25 for at least the next 400 years.[5]
| 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 | 15.3 | 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 5lunar distances (LD) of objects withH brighter than 18. (B)Nominal geocentric distance from the Earth's center to the object's center (Earth radius≈0.017 LD). (C) Diameter: estimated, theoretical mean-diameter based onH andalbedo range between X and Y. (D) Reference: data source from theJPL SBDB, withAU converted into LD (1 AU≈390 LD) (E) Color codes: unobserved at close approach observed during close approach upcoming approaches | |||||||
2014 JO25 is a peanut-shapedcontact binary asteroid. It is an assumed to be a stonyS-type asteroid.[4] The overall shape of the asteroid also resembles the “rubber ducky shaped” nucleus of Comet67P/Churyumov-Gerasimenko.[6][7]
Early estimation based on observedabsolute magnitude and estimatedalbedo indicates object 600–1400 meters (m) in diameter. In 2014, further research based onNEOWISE data indicated an object of 650 m in diameter and albedo 0.25.[8]
Based on a generic magnitude-to-diameter conversion,2014 JO25 measures approximately 720 m in diameter, using an absolute magnitude of 18.1 and assuming analbedo of 0.20, which is typical for stony asteroids.[3] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 818 meters based on an absolute magnitude of 17.8.[4]
Observation of the asteroid with theGoldstone Solar System Radar were performed between April 15 and 21, 2017 byArecibo Observatory andGoldstone Solar System Radar. Results show that the largest dimension of this contact binary is at least 870 meters.[4][9]
The 2017 radiometric observations at Arecibo and Goldstone also gave arotation period of approximately 4.5 hours.[9] Also in April 2017, a rotationallightcurve of this asteroid was obtained fromphotometric observations byBrian Warner at the Palmer Divide Station (U82) in California. Lightcurve analysis gave a refined period of 4.531 hours with a brightness amplitude between 0.14 and 0.64magnitude (U=n.a.).[10]
Thisminor planet wasnumbered by theMinor Planet Center on 22 March 2024 (M.P.C. 172656).[11] As of April 2024[update], it has not beennamed.[2]
Radar images of the asteroid were taken on 18 April 2017 by theGoldstone Solar System Radar:
2014 JO25 on a graph plotting the closest flyby distance to Earth and size of NEOs in 2017.
2017 in space | ||
|---|---|---|
Space probe launches |
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| Impact events | ||
| SelectedNEOs | ||
| Exoplanets | ||
| Discoveries | ||
| Comets | ||
| Space exploration |
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