Asteroids

2021RV1 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.828

Aphelion (Q)

1.338

Eccentricity (e)

0.236

Inclination (i)

2.7

deg

Orbit period (P)

411.7

Earth MOID

0.00367

U parameter

6.8

Next Earth close approach

Date

2030-09-28

Nominal distance (from Earth center)

0.09707

14521828

Maximum Brightness

26.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

10 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-09-06

Observatory

Mt. Lemmon Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.083034

1-sigma variation

0.000104

Unit

Eccentricity (e)

Value

0.235853

1-sigma variation

0.000150

Unit

Inclination (i)

Value

2.7103

1-sigma variation

0.0020

Unit

Long. of Ascending Node (Ω)

Value

333.3766

1-sigma variation

0.0017

Unit

Arg. of Perihelion (ω)

Value

102.4014

1-sigma variation

0.0045

Unit

Mean Anomaly (M)

Value

199.23451

1-sigma variation

0.17405

Unit

Perihelion distance

Value

0.827597

1-sigma variation

Unit

Aphelion distance

Value

1.338471

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.065961

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.016474

1-sigma variation

Unit

MOID

Value

0.003671

1-sigma variation

Unit

Orbit Period

Value

411.6816

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.07272E-8	1.55107E-8	2.04648E-7	1.72490E-7	-4.51587E-7	-1.80271E-5
e	1.55107E-8	2.24660E-8	2.95648E-7	2.46858E-7	-6.45039E-7	-2.60661E-5
i	2.04648E-7	2.95648E-7	3.90761E-6	3.31455E-6	-8.67425E-6	-3.43909E-4
Ω	1.72490E-7	2.46858E-7	3.31455E-6	2.97031E-6	-7.80997E-6	-2.89846E-4
ω	-4.51587E-7	-6.45039E-7	-8.67425E-6	-7.80997E-6	2.06547E-5	7.58816E-4
M	-1.80271E-5	-2.60661E-5	-3.43909E-4	-2.89846E-4	7.58816E-4	3.02946E-2

Date of computation: 2025-09-10 00:30 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

27.222

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

10 - 21*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

1469

Unit

Source

[1]

Normalized RMS of residuals

Value

0.48213

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-09-06.398723

Unit

Source

[2]

Last Observation

Value

2021-09-09.94042

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

39 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2021RV1 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-08-22 17:32	> 1 w	0.1755304	0.1361655	0.0132039
EARTH	1952-10-31 06:29	> 1 w	0.1420213	0.1231169	0.0063024
EARTH	1962-01-26 05:28	> 1 w	0.1129207	0.0445883	0.0233414
EARTH	1969-09-05 23:06	> 1 d	0.0911511	0.0116950	0.0649011
EARTH	1971-03-05 01:17	> 1 d	0.1278381	0.0031325	0.0651773
EARTH	1978-10-15 11:44	> 1 w	0.1210470	0.0401135	0.0269973
EARTH	1987-12-29 07:36	> 1 w	0.1500883	0.1370196	0.0043879
EARTH	1995-09-02 10:18	574.0	0.1736834	0.1539186	0.0065907
EARTH	1997-02-28 07:37	968.6	0.0488260	0.0137119	0.0117411
EARTH	2004-10-24 11:12	> 1 d	0.1327685	0.1181759	0.0048650
EARTH	2014-02-14 05:24	> 1 d	0.0772402	0.0565993	0.0068885
EARTH	2021-09-11 05:21	< 1 min	0.0161201	0.0160882	0.0000106
EARTH	2023-03-09 10:29	37.3	0.1899262	0.1877468	0.0007264
EARTH	2030-09-28 21:53	> 1 d	0.0970724	0.0757439	0.0071134
EARTH	2039-11-25 12:44	> 1 w	0.1612210	0.1574425	0.0012606
EARTH	2049-01-13 08:05	> 1 w	0.1339319	0.1150289	0.0063447
EARTH	2056-09-01 02:33	677.4	0.1957241	0.1573033	0.0128123
EARTH	2058-02-27 02:47	1263.6	0.0106876	0.0034874	0.0113020
EARTH	2065-12-26 21:40	> 1 mo	0.1513218	0.0599691	0.0875750
EARTH	2073-10-21 08:30	> 1 mo	0.1246711	0.0004120	0.3866735
EARTH	2081-09-10 00:09	> 1 mo	0.0742027	0.0148236	0.8668527
EARTH	2091-02-20 18:19	> 1 w	0.0556324	0.0084412	0.1064130
EARTH	2098-11-16 09:21	> 1 mo	0.1533699	0.0114502	0.1385874
EARTH	2106-09-10 02:41	> 1 mo	0.0894972	0.0144499	1.3684440
EARTH	2108-03-09 08:00	> 1 mo	0.1724626	0.0060138	1.3960651
EARTH	2116-01-16 19:40	> 1 mo	0.1310991	0.0359219	0.5114209
EARTH	2123-09-28 17:38	> 1 mo	0.0881830	0.0112713	0.5626156

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
68.58466200	54.63849654	0.00352298	MINIMUM
286.89883965	247.75818878	0.01317671	MINIMUM
357.20792360	330.55179248	0.16345822	SADDLE
178.32270436	151.90265695	0.32851313	SADDLE
357.66964808	151.14495942	1.84148502	SADDLE
178.71909890	332.22764698	2.32330075	MAXIMUM

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MOID Plots

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