420 Bertholda

{{Short description|Main-belt asteroid}}

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

{{Infobox planet

| minorplanet=yes

| background=#D6D6D6

| name=420 Bertholda

| discoverer=Max Wolf

| discovered=7 September 1896

| mpc_name=(420) Bertholda

| alt_names=1896 CY

| mp_category=Main belt (Cybele)

| epoch=31 July 2016 (JD 2457600.5)

| semimajor={{Convert|3.4163|AU|Gm|abbr=on}}

| perihelion={{Convert|3.3110|AU|Gm|abbr=on}}

| aphelion={{Convert|3.5216|AU|Gm|abbr=on|lk=on}}

| eccentricity=0.030818

| period=6.31 yr (2306.4 d)

| inclination=6.6874°

| asc_node=242.661°

| arg_peri=236.020°

| mean_anomaly=220.0218°

| dimensions={{val|141.25|6.9|ul=km}}
141.54 ± 2.08 km

| mass={{nowrap|(1.48 ± 0.09) × 10¹⁹ kg}}

| density=9.96 ± 0.75 g/cm³

| rotation={{Convert|11.04|h|d|abbr=on|lk=on}}

| spectral_type=P

| abs_magnitude=8.3

| albedo={{val|0.0420|0.004}}

| mean_motion={{Deg2DMS|0.15609|sup=ms}} / day

| orbit_ref={{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=420;cad=1 |title=420 Bertholda (1896 CY) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=10 May 2016}}

| observation_arc=115.96 yr (42353 d)

| uncertainty=0

| moid={{Convert|2.33214|AU|Gm|abbr=on}}

| jupiter_moid={{Convert|1.58341|AU|Gm|abbr=on}}

| tisserand=3.132

}}

420 Bertholda is a very large main-belt asteroid. It was discovered by Max Wolf on September 7, 1896, in Heidelberg, Germany. The object is part of the Cybele asteroid group, and is classified as a P-type asteroid.