339 Dorothea

{{Short description|Main-belt asteroid}}

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

{{Infobox planet

| minorplanet=yes

| background=#D6D6D6

| name=339 Dorothea

| discoverer=Max Wolf

| discovered=25 September 1892

| mpc_name=(339) Dorothea

| alt_names=1892 G

|image= Орбита астероида 339.png

|caption=Orbital diagram

| pronounced= {{IPAc-en|d|ɒ|ə|'|θ|iː|ə}}Noah Webster (1884) A Practical Dictionary of the English Language

| named_after=Dorothea Klumpke

| mp_category=Main belt (Eos)

| orbit_ref=

| epoch=31 July 2016 (JD 2457600.5)

| semimajor={{Convert|3.01176|AU|Gm|abbr=on}}

| perihelion={{Convert|2.71937|AU|Gm|abbr=on}}

| aphelion={{Convert|3.3041|AU|Gm|abbr=on|lk=on}}

| eccentricity=0.097082

| period=5.23 yr (1909.1 d)

| inclination=9.9640°

| asc_node=173.512°

| arg_peri=164.360°

| mean_anomaly=271.598°

| dimensions={{val|38.25|1.6|ul=km}}

| mass=

| density=

| rotation={{Convert|5.974|h|d|abbr=on|lk=on}}

| spectral_type=S {{small|(Tholen)}}
K {{small|(SMASSII)}}

| abs_magnitude=9.24

| albedo={{val|0.2431|0.021}}

| mean_motion={{Deg2DMS|0.188570|sup=ms}} / day

| observation_arc=123.55 yr (45128 d)

| uncertainty=0

}}

339 Dorothea is a large main belt asteroid that was discovered by German astronomer Max Wolf on 25 September 1892 in Heidelberg.

This is a member of the dynamic Eos family of asteroids that were probably formed as the result of a collisional breakup of a parent body.

This asteroid is named after astronomer Dorothea Klumpke,[https://www.vaticanobservatory.org/sacred-space-astronomy/specola-guestbook-december-29-1908/ Vatican Observatory website] as is 1040 Klumpkea.