644 Cosima

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

{{Infobox planet

| minorplanet= yes

| name= 644 Cosima

| background = #D6D6D6

| image = 000644-asteroid shape model (644) Cosima.png

| image_scale =

| caption = Modelled shape of Cosima from its lightcurve

| mpc_name= (644) Cosima

| alt_names= 1907 AA

| discoverer= August Kopff

| discovered= 7 September 1907

| discovery_site= Heidelberg

| epoch= 31 July 2016 (JD 2457600.5)

| eccentricity= 0.15589

| semimajor= {{Convert|2.5990|AU|Gm|abbr=on}}

| perihelion= {{Convert|2.1938|AU|Gm|abbr=on}}

| aphelion= {{Convert|3.0041|AU|Gm|abbr=on|lk=on}}

| period= 4.19 yr (1530.4 d)

| inclination= 1.0409°

| asc_node= 109.975°

| arg_peri= 268.690°

| mean_anomaly= 357.546°

| mean_motion= {{Deg2DMS|0.23524|sup=ms}} / day

| orbit_ref= {{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=644;cad=1 |title=644 Cosima (1907 AA) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=5 May 2016}}

| observation_arc= 107.84 yr (39390 d)

| uncertainty= 0

| abs_magnitude= 11.13

| rotation= {{Convert|7.556|h|d|abbr=on|lk=on}}

| albedo= {{val|0.1572|0.028}}

| mean_radius= {{val|9.96|0.75}} km

}}

644 Cosima is a minor planet orbiting the Sun.