2003 LA7

{{DISPLAYTITLE:2003 LA₇}}

{{Use dmy dates|date=September 2019}}

{{Infobox planet

| minorplanet = yes

| background = #C2E0FF

| name = {{mp|2003 LA|7}}

| symbol =

| image =

| caption =

| discovery_ref =

| discoverer =

| discovered = 2003

| mpc_name = {{mp|2003 LA|7}}

| mp_category = 1:4 resonance{{Cite web

|title=MPEC 2009-C70 :Distant Minor Planets (2009 FEB. 28.0 TT)

|date=10 February 2009

|publisher=Minor Planet Center

|url=http://www.cfa.harvard.edu/mpec/K09/K09C70.html

|accessdate=14 March 2009}}{{Cite web

|author=Marc W. Buie

|author-link=Marc W. Buie

|type=last observation: 2008-03-12 using 17 of 18 observations

|title=Orbit Fit and Astrometric record for 03LA7

|publisher=SwRI (Space Science Department)

|url=http://www.boulder.swri.edu/~buie/kbo/astrom/03LA7.html

|accessdate=13 October 2014}}

| orbit_ref ={{Cite web

|type=last observation: 2007-04-21

|title=JPL Small-Body Database Browser: (2003 LA7)

|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003LA7

|accessdate=30 March 2016}}

| epoch = 13 January 2016 (JD 2457400.5)

| aphelion = {{Convert|116.44|AU|Tm|abbr=on|lk=on}} (Q)

| perihelion = {{Convert|36.002|AU|Tm|abbr=on}} (q)

| semimajor = {{Convert|76.220|AU|Tm|abbr=on}} (a)

| eccentricity = 0.52765 (e)

| period = 665.45 yr (243054 d)

| avg_speed =

| inclination = 5.6369° (i)

| asc_node = 34.076° (Ω)

| mean_anomaly = 346.07° (M)

| arg_peri = 271.47° (ω)

| satellites =

| dimensions = ~231 km (assumed){{Cite web

|date=22 August 2008

|title=List of Known Trans-Neptunian Objects

|publisher=Johnston's Archive

|author=Wm. Robert Johnston

|url=http://www.johnstonsarchive.net/astro/tnoslist.html

|accessdate=14 March 2009| archiveurl= https://web.archive.org/web/20090213132019/http://johnstonsarchive.net/astro/tnoslist.html| archivedate= 13 February 2009 | url-status= live}}

| mass =

| density =

| surface_grav =

| escape_velocity =

| sidereal_day =

| axial_tilt =

| pole_ecliptic_lat =

| pole_ecliptic_lon =

| albedo = 0.09 (assumed)

| spectral_type =

| magnitude = ~22.4{{Cite web

|title = AstDys 2003LA7 Ephemerides

|publisher = Department of Mathematics, University of Pisa, Italy

|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=2003LA7

|accessdate = 19 March 2009

|archiveurl = https://web.archive.org/web/20110526232619/http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.0&n=2003LA7

|archivedate = 26 May 2011

|url-status = live

}}

| abs_magnitude = 6.5

| mean_motion = {{Deg2DMS|0.0014812|sup=ms}} /day (n)

| observation_arc = 1746 days (4.78 yr)

| uncertainty = 3

| moid = {{Convert|34.9906|AU|Tm|abbr=on}}

| jupiter_moid = {{Convert|30.912|AU|Tm|abbr=on}}

}}

{{mp|2003 LA|7}}, is a resonant trans-Neptunian object that goes around the Sun once for every four times that Neptune goes around. This means it is in a 1:4 orbital resonance with Neptune. Another example of such object in this resonance is {{mpl|2011 UP|411}}.

class=wikitable width=480 |valign=top|{{center|Orbit}}250px The orbit of "fourtino" 2003 LA7 compared to Pluto and Neptune. |valign=top|{{center|1:4 Libration}}350px Neptune is held stationary at 5 o'clock.

2003 LA₇ is in a 1:4 resonance with the planet Neptune. For every one orbit that a it makes, Neptune orbits 4 times.

It is currently 43 AU from the Sun, and will come to perihelion around 2041.

Assuming a generic TNO albedo of 0.09, it is about 231 km in diameter.

It has been observed 14 times over 4 oppositions.