(15977) 1998 MA11

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(15977) 1998 MA11
Discovery[1]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date19 June 1998
Designations
(15977) 1998 MA11
1998 MA11 · 1999 NG2
Minor planet category
Jupiter trojan[1][2]
Trojan[3] · background[4]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc64.37 yr (23,510 d)
Aphelion5.4295 AU
Perihelion4.9353 AU
5.1824 AU
Eccentricity0.0477
11.80 yr (4,309 d)
72.300°
0° 5m 0.6s / day
Inclination17.344°
209.57°
229.49°
Jupiter MOID0.0328 AU
TJupiter2.9070
Physical characteristics
Mean diameter
43.53±0.86 km[5]
51.53±3.86 km[6]
250±5 h[7][a]
0.046[6]
0.071±0.008[5]
C (assumed)[8]
B–V = 0.748±0.033[9]
V–R = 0.465±0.025[9]
V–I = 0.906±0.026[9]
Absolute magnitude (H)
10.30[5]
10.40[1][2][6][8]

(15977) 1998 MA11, provisional designation 1998 MA11, is a Jupiter trojan from the Trojan camp, approximately 45 kilometers (28 miles) in diameter. It was discovered on 19 June 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico, in the United States.[1] The suspected tumbler is also a slow rotator with a period of 250 hours.[8] It has not been named since its numbering in July 2000.[10]

Orbit and classification[]

1998 MA11 is a Jupiter trojan in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's L5 Lagrangian point, 60° behind its orbit (see Trojans in astronomy).[3]

It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 10 months (4,309 days; semi-major axis of 5.18 AU). Its orbit has an eccentricity of 0.05 and an inclination of 17° with respect to the ecliptic.[2] The body's observation arc begins with a precovery published by the Digitized Sky Survey and taken at Palomar Observatory in December 1953, more than 44 years prior to its official discovery observation at Socorro.[1]

Numbering and naming[]

This minor planet was numbered by the Minor Planet Center on 26 July 2000 (M.P.C. 40994).[10] As of 2018, it has not been named.[1]

Physical characteristics[]

1998 MA11 is an assumed C-type asteroid.[8] It has a typical V–I color index of 0.906 (see table below).[9]

Rotation period[]

In August 2013, Robert Stephens at the Center for Solar System Studies observed 1998 MA11 over three nights. However no meaningful rotational lightcurve could be determined, as the lightcurve's amplitude never varied more than 0.02 magnitude. A period of 11.17 hours was only derived for demonstration purpose (U=2-).[11] In December 2015, Stephens obtained an improved lightcurve with a rotation period of 250±5 hours and a brightness variation of 0.30 magnitude (U=2-). This time the asteroid was observed on 16 nights over a period of one month. The photometric observations also revealed that this object possibly has a non-principal axis rotation, which is commonly known as tumbling.[7][8][a]

Diameter and albedo[]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Japanese Akari satellite, 1998 MA11 measures 43.53 and 51.53 kilometers in diameter and its surface has an albedo of 0.071 and 0.046, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 46.30 kilometers based on an absolute magnitude of 10.4.[8]

100+ largest Jupiter trojans

Notes[]

  1. ^ Jump up to: a b Lightcurve plots of (15977) 1998 MA11 from Aug 2013 and Dec 2015 by Robert Stephens at the Center for Solar System Studies (U81). Quality code is 1/2- (lightcurve rating at CS3). Summary figures at the LCDB and CS3.

References[]

  1. ^ Jump up to: a b c d e f "15977 (1998 MA11)". Minor Planet Center. Retrieved 1 July 2018.
  2. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 15977 (1998 MA11)" (2018-04-20 last obs.). Jet Propulsion Laboratory. Retrieved 1 July 2018.
  3. ^ Jump up to: a b "List of Jupiter Trojans". Minor Planet Center. 1 July 2018. Retrieved 1 July 2018.
  4. ^ "Asteroid (15977) 1998 MA11 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 1 July 2018.
  5. ^ Jump up to: a b c d Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. S2CID 119101711. (online catalog)
  6. ^ Jump up to: a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
  7. ^ Jump up to: a b Stephens, Robert D.; Coley, Daniel R.; French, Linda M. (July 2016). "A Report from the L5 Trojan Camp - Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies". The Minor Planet Bulletin. 43 (3): 265–270. Bibcode:2016MPBu...43..265S. ISSN 1052-8091.
  8. ^ Jump up to: a b c d e f "LCDB Data for (15977)". Asteroid Lightcurve Database (LCDB). Retrieved 1 July 2018.
  9. ^ Jump up to: a b c d Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited". Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. S2CID 54776793.
  10. ^ Jump up to: a b "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 July 2018.
  11. ^ Stephens, Robert D.; French, Linda M.; Davitt, Chelsea; Coley, Daniel R. (April 2014). "At the Scaean Gates: Observations Jovian Trojan Asteroids, July- December 2013". The Minor Planet Bulletin. 41 (2): 95–100. Bibcode:2014MPBu...41...95S. ISSN 1052-8091.

External links[]

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