Asteroids

452302 1995YR1 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.294

Aphelion (Q)

3.102

Eccentricity (e)

0.827

Inclination (i)

3.6

deg

Orbit period (P)

808.4

Earth MOID

0.01400

U parameter

0.0

Next Earth close approach

Date

2031-09-11

Nominal distance (from Earth center)

0.1698

25401026

Maximum Brightness

19.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.1

mag

Diameter

250 - 600*

Taxonomic type

Rotation period (T)

5.006

Discovery Information

Discovery Date

1995-12-20

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.698259

1-sigma variation

7.577E-9

Unit

Eccentricity (e)

Value

0.826811

1-sigma variation

1.579E-8

Unit

Inclination (i)

Value

3.5818

1-sigma variation

4.089E-6

Unit

Long. of Ascending Node (Ω)

Value

106.5154

1-sigma variation

4.414E-5

Unit

Arg. of Perihelion (ω)

Value

110.0351

1-sigma variation

4.435E-5

Unit

Mean Anomaly (M)

Value

64.82831

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.294119

1-sigma variation

Unit

Aphelion distance

Value

3.102399

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.232995

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.597885

1-sigma variation

Unit

MOID

Value

0.013998

1-sigma variation

Unit

Orbit Period

Value

808.3592

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.74139E-17	7.52748E-17	-4.21578E-15	3.57439E-14	-2.38895E-14	-7.90965E-14
e	7.52748E-17	2.49413E-16	-1.57452E-15	1.58902E-13	-1.19128E-13	-1.01627E-13
i	-4.21578E-15	-1.57452E-15	1.67206E-11	-4.37467E-11	4.27457E-11	6.08635E-12
Ω	3.57439E-14	1.58902E-13	-4.37467E-11	1.94858E-9	-1.95418E-9	-5.12065E-11
ω	-2.38895E-14	-1.19128E-13	4.27457E-11	-1.95418E-9	1.96680E-9	3.52611E-11
M	-7.90965E-14	-1.01627E-13	6.08635E-12	-5.12065E-11	3.52611E-11	1.09016E-10

Date of computation: 2025-07-29 02:36 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

5.006

Unit

Source

[3]

Quality

Value

Unit

Source

[3]

Amplitude

Value

0.23

Unit

mag

Source

[3]

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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.142

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[5]

Diameter

Value

250 - 600*

Unit

Source

[5]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[6]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	EARN	1.) Warner, B.D. (2016) MPB 43, 143-154. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2015 OCTOBER-DECEMBER)(36NEAs)
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	Estimation	Estimated from absolute magnitude
[6]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

9062

Unit

Source

[1]

Unobserved

Value

1785

Unit

Source

[1]

Normalized RMS of residuals

Value

0.588466

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1995-12-20.14438

Unit

Source

[2]

Last Observation

Value

2020-10-11.41287

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

223 (3)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2015-12-18

Unit

Source

[3]

Last Observation

Value

2015-12-22

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

4 (0)

Unit

Source

[1]

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
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 452302 1995YR1 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	1958-09-04 16:35	< 1 min	0.0614323	0.0614316	0.0000002
16 Psyche	1975-09-12 16:13	< 1 s	0.0163984	0.0163973	0.0000004
MERCURY	1980-08-27 18:51	< 1 min	0.0269906	0.0269879	0.0000009
EARTH	1984-12-25 08:24	< 1 min	0.0259849	0.0259822	0.0000009
EARTH	1989-08-27 04:36	< 1 min	0.1658800	0.1658769	0.0000010
EARTH	2015-12-23 18:43	< 1 s	0.0434862	0.0434862	0.0000000
EARTH	2031-09-11 05:42	< 1 min	0.1697954	0.1697938	0.0000005
VENUS	2044-10-15 09:22	< 1 min	0.0376081	0.0376055	0.0000009
EARTH	2046-12-19 23:54	< 1 min	0.1261551	0.1261528	0.0000008
VENUS	2055-11-12 06:09	< 1 min	0.0403735	0.0403724	0.0000004
EARTH	2062-09-12 13:54	< 1 s	0.1977167	0.1977160	0.0000002
EARTH	2077-12-26 19:55	< 1 min	0.0327805	0.0327775	0.0000010
EARTH	2082-08-30 05:46	< 1 min	0.1272737	0.1272715	0.0000007
MERCURY	2093-08-12 12:26	< 1 min	0.0253199	0.0253192	0.0000002
EARTH	2097-12-19 07:57	< 1 min	0.1498787	0.1498768	0.0000006

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
300.62056212	351.22587277	0.01399799	MINIMUM
60.44183210	239.34719872	0.05122402	MINIMUM
1.85423842	117.53922673	0.71358434	SADDLE
1.85900597	297.59892177	1.28645487	SADDLE
180.16167095	294.67742996	2.11182319	SADDLE
180.19992113	114.69293795	4.10773425	MAXIMUM

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MOID Plots

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