285 Regina

{{Short description|Main-belt asteroid}}

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

{{Infobox planet

| minorplanet=yes

| background=#D6D6D6

|image= Орбита астероида 285.png

|caption=Orbital diagram | name=285 Regina

| discoverer=Auguste Charlois

| discovered=3 August 1889

| mpc_name=(285) Regina

| pronounced={{IPAc-en|r|ᵻ|'|dʒ|aɪ|n|ə}} {{respell|rij|EYE|nə}}{{OED|Regina}}

| alt_names=A889 PA, 1911 QJ
{{mp|1951 AC|1}}

| mp_category=Main belt

| epoch=31 July 2016 (JD 2457600.5)

| semimajor={{Convert|3.08335|AU|Gm|abbr=on}}

| perihelion={{Convert|2.44540|AU|Gm|abbr=on}}

| aphelion={{Convert|3.72130|AU|Gm|abbr=on|lk=on}}

| eccentricity=0.20690

| period=5.41 yr (1977.6 d)

| inclination=17.6192°

| asc_node=311.385°

| arg_peri=14.4439°

| mean_anomaly=137.349°

| avg_speed=16.97 km/s

| dimensions={{val|45.13|2.2|ul=km}}

| mass=

| density=

| rotation={{Convert|9.542|h|d|abbr=on|lk=on}}

| spectral_type=

| abs_magnitude=10.7

| albedo={{val|0.0547|0.006}}

| single_temperature=unknown

| mean_motion={{Deg2DMS|0.182041|sup=ms}} / day

| orbit_ref=

| observation_arc=104.63 yr (38215 d)

| uncertainty=0

}}

285 Regina is a typical, although fairly large, Main belt asteroid. It was discovered by Auguste Charlois on 3 August 1889 in Nice, France. The asteroid is a suspected interloper in the Eucharis asteroid family.

Analysis of the asteroid light curve generated from photometric data collected during 2008 show a rotation period of {{val|9.542|0.001|u=hours}} with a brightness variation of {{val|0.16|0.03}} in magnitude.