1722 Goffin,provisional designation1938 EG,is a stonyasteroidfrom the central region of theasteroid belt,approximately 10.3 kilometers in diameter.
| Discovery[1] | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 23 February 1938 |
| Designations | |
| (1722) Goffin | |
Named after | Edwin Goffin (amateur astronomer)[2] |
| 1938 EG·1942 DJ 1950 HK·1952 SW 1952 UQ·1960 WB 1964 UF·1964 VD1 | |
| main-belt·(middle)[3] | |
| Orbital characteristics[1] | |
| Epoch4 September 2017 (JD2458000.5) | |
| Uncertainty parameter0 | |
| Observation arc | 79.09 yr (28,889 days) |
| Aphelion | 2.6369AU |
| Perihelion | 2.3902 AU |
| 2.5135 AU | |
| Eccentricity | 0.0491 |
| 3.99yr(1,456 days) | |
| 42.038° | |
| 0° 14m50.28s/ day | |
| Inclination | 5.4668° |
| 168.12° | |
| 283.20° | |
| Physical characteristics | |
| Dimensions | 10.290±0.118[4] 10.44 km(taken)[3] 10.442km[5] 10.446±0.130km[6] |
| 28.8±1.0h[a] 31h[7] | |
| 0.2175[5] 0.2191±0.0165[6] 0.224±0.041[4] | |
| S(est.)[7]·S[3] B–V= 0.890[1] | |
| 12.18[3][5][6][a]·12.30[1]·12.34[7] | |
It was discovered on 23 February 1938, by Belgian astronomerEugène Delporteat theRoyal Observatory of Belgiumin Uccle, Belgium.[8]It was later named after Belgian amateur astronomerEdwin Goffin,following a suggestion byJean Meeus.[2]
Orbit and classification
editMinor planet 1722 Goffin orbits the Sun at a distance of 2.4–2.6AUonce every 3 years and 12 months (1,456 days). Its orbit has aneccentricityof 0.05 and aninclinationof 5°with respect to theecliptic.[1]The body'sobservation arcbegins 6 days after its official discovery observation.[8]
Physical characteristics
editIt is an assumedS-type asteroid,one of the most common spectral types.[3][7]American astronomerSherry Fieber-BeyeratNASA_Infrared_Telescope_Facilityobtained VNIR spectra on July 20, 2011. The resulting spectrum analysis showed an S-IV assemblage with a derived L-chondrite mineralogy.[9]
Lightcurves
edit(1722)'s first rotationallightcurvewas obtained by American astronomerRichard P. BinzelatUT Austinin October 1984. It gave arotation periodof 31 hours and an brightness variation of 0.63magnitude(U=2),[7]while Czech astronomersPetr PravecandAdrián GaládatOndřejov Observatoryderived a period of 28.8 hours with and amplitude of 0.6 magnitude using Binzel's photmetric observations (U=n.a.).[a]
Diameter and albedo
editAccording to the survey carried out by NASA'sWide-field Infrared Survey Explorerwith its subsequentNEOWISEmission,Goffinmeasures 10.29 kilometers in diameter and its surface has analbedoof 0.224 (using the 2014-published revised near-infrared albedo fits),[4]superseding a preliminary published diameter of 10.446 kilometers.[6]TheCollaborative Asteroid Lightcurve Linktakes Petr Pravec's 2012-revised WISE data, that gave an albedo of 0.2175 and a diameter of 10.442 kilometers.[3][5]
Naming
editThisminor planetwas named in honor of the Belgianamateur astronomerEdwin Goffin (born 1950), who has made extensive computations involving minor-planet orbits, and whose initials are indicated by the body'sprovisional designation,1938 EG.[2]The official naming citation was published by theMinor Planet Centeron 8 April 1982 (M.P.C.6832).[10]
Notes
edit- ^abcPravec (1984) web: rotation period28.8±1.0hours with a brightness amplitude of0.6mag. Quality code is not available. Summary figures atCollaborative Asteroid Lightcurve Link (CALL) for (1722) GoffinandPravec, P.; Wolf, M.; Sarounova, L. (1984)
References
edit- ^abcde"JPL Small-Body Database Browser: 1722 Goffin (1938 EG)"(2017-03-29 last obs.).Jet Propulsion Laboratory.Retrieved7 June2017.
- ^abcSchmadel, Lutz D. (2007). "(1722) Goffin".Dictionary of Minor Planet Names – (1722) Goffin.Springer Berlin Heidelberg.p. 137.doi:10.1007/978-3-540-29925-7_1723.ISBN978-3-540-00238-3.
- ^abcdef"LCDB Data for (1722) Goffin".Asteroid Lightcurve Database (LCDB).Retrieved21 December2016.
- ^abcMasiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014)."Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos".The Astrophysical Journal.791(2): 11.arXiv:1406.6645.Bibcode:2014ApJ...791..121M.doi:10.1088/0004-637X/791/2/121.Retrieved21 December2016.
- ^abcdPravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012)."Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations".Icarus.221(1): 365–387.Bibcode:2012Icar..221..365P.doi:10.1016/j.icarus.2012.07.026.Retrieved21 December2016.
- ^abcdMainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results".The Astrophysical Journal.741(2): 25.arXiv:1109.6407.Bibcode:2011ApJ...741...90M.doi:10.1088/0004-637X/741/2/90.
- ^abcdeBinzel, R. P. (October 1987)."A photoelectric survey of 130 asteroids".Icarus.72(1): 135–208.Bibcode:1987Icar...72..135B.doi:10.1016/0019-1035(87)90125-4.ISSN0019-1035.Retrieved21 December2016.
- ^ab"1722 Goffin (1938 EG)".Minor Planet Center.Retrieved21 December2016.
- ^Fieber-Beyer, S. K. and Gaffey, M. J. Icarus 229 (2014) 99–108
- ^"MPC/MPO/MPS Archive".Minor Planet Center.Retrieved21 December2016.
External links
edit- Pravec, P.; Wolf, M.; Sarounova, L. (1984)http://www.asu.cas.cz/~ppravec/neo.htm
- Minor Planet Circular 6832https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
- Asteroid Lightcurve Database (LCDB),query form (infoArchived16 December 2017 at theWayback Machine)
- Dictionary of Minor Planet Names,Google books
- Asteroids and comets rotation curves, CdR– Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000)– Minor Planet Center
- 1722 GoffinatAstDyS-2, Asteroids—Dynamic Site
- 1722 Goffinat theJPL Small-Body Database
