 2000 YW134 and its satellite (upper right) imaged by theHubble Space Telescope on 25 October 2002 | |
| Discovery[1][2] | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 26 December 2000 |
| Designations | |
| (82075)2000 YW134 | |
| 2000 YW134 · 2001 XG201[3] | |
| TNO[4] · res (3:8)[5][6] | |
| Orbital characteristics[4] | |
| Epoch 1 July 2021 (JD 2459396.5) | |
| Uncertainty parameter 2[2][4] | |
| Observation arc | 20.19yr (7,373 d) |
| Aphelion | 73.783AU |
| Perihelion | 40.999 AU |
| 57.391 AU | |
| Eccentricity | 0.2856 |
| 434.78 yr (158,805 d) | |
| 35.927° | |
| 0° 0m 8.28s / day | |
| Inclination | 19.866° |
| 127.00° | |
| 314.98° | |
| Knownsatellites | 1 (Ds/Dp: 0.347)[7] |
| Physical characteristics | |
| >0.08[8] 0.408±0.329[5][7] | |
| 21.54[11] | |
| 4.72[2][4] | |
(82075) 2000 YW134 (provisional designation2000 YW134) is aresonant trans-Neptunian object andbinary system, located in the outermost region of theSolar System. It was discovered on 26 December 2000, by astronomers with theSpacewatch survey atKitt Peak Observatory near Tucson, Arizona. Thereddish object stays in a rare3:8 resonance withNeptune. A smallercompanion was discovered by theHubble Space Telescope in October 2002.[7]
2000 YW134 orbits the Sun at a distance of 41.0–73.8 AU once every 434 years and 9 months (158,805 days;semi-major axis of 57.39 AU). Its orbit has aneccentricity of 0.29 and aninclination of 20° with respect to theecliptic.[4] The body'sobservation arc begins with its official discovery observation bySpacewatch on 26 December 2000.[2] It lastcame to perihelion in 1979,[12] and is currently at about 46.5 AU from the Sun, with anapparent magnitude of 21.54.[11] It will reach aphelion in December 2197.[12]
2000 YW134 is aresonant trans-Neptunian object that stays in a rare3:8 mean-motionorbital resonance withNeptune, orbiting exactly three times the Sun for every 8 orbits Neptune does.[6] There are currently two other objects known to have the same resonant type:2014 UE228 and(542258) 2013 AP183.[5][13] Due to its relatively large distance to Neptune, a classification as an extended-scattered ordetached object was also considered earlier on (Lykawka, 2006). However, improved observations and long-term numerical integrations of the object's orbit by Emelʹyanenko and Kiseleva (84% probability) and theDeep Ecliptic Survey – with all alternative integrations in agreement, showing a minimumperihelion distance of 38.2 AU – have since secured its 3:8 orbital resonance with Neptune.[6][14]
Thisminor planet wasnumbered by theMinor Planet Center on 4 May 2004, receiving the number82075 in theminor planet catalog (M.P.C. 51853).[15] As of 2025[update], it has not beennamed.[2] According to the establishednaming conventions, it will be given a mythological name.[16]
The surface of2000 YW134 is moderately red in the visible part of the spectrum. ItsIR spectral type transitions from the very red (RR) to the intermediate blue-red (BR).[10] Alternatively a BR-spectral type has also been assumed.[7] The object's B−V and V–Rcolor indices have also been measured several times, giving an averaged value of close to 1.0 and 0.5, respectively, for a combined B−R magnitude of 1.50.[9]
In 2010, observations with theHerschel Space Observatory constrained the object'sgeometric albedo to no darker than 8%, and allowed to place an upper limit on its effectivemean diameter of 500 km (310 mi), as nothermal radiation had been detected.[8] However, according toMichael Mommert's dissertation in 2013, the object has a much higher albedo of0.408±0.329, which greatly reduces its effective diameter to 229 km (140 mi).[7]
On 25 October 2002, observations in thefar-infrared with theNICMOS instrument of theHubble Space Telescope revealed that2000 YW134 is abinary system with asatellite in its orbit. The discovery was announced on 6 October 2005.[7][17]: 22 Johnston's Archive derives a diameter of 216 km (130 mi) for theprimary and a diameter of 75 km (47 mi) for the secondary, based on a secondary-to-primary diameter ratio of 0.347, for a difference of 1.3magnitudes between the two objects. The satellite orbits its primary every 10 days (estimated) at an average distance of 1,900 km (1,200 mi).[7]
