Asteroids

2017BP31 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.644

Aphelion (Q)

3.595

Eccentricity (e)

0.696

Inclination (i)

1.6

deg

Orbit period (P)

1127.0

Earth MOID

0.02310

U parameter

0.0

Next Earth close approach

Date

2026-08-28

Nominal distance (from Earth center)

0.0286

4278971

Maximum Brightness

14.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.8

mag

Diameter

300 - 700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-01-27

Observatory

Pan-STARRS 1, Haleakala

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.119380

1-sigma variation

1.309E-8

Unit

Eccentricity (e)

Value

0.696077

1-sigma variation

3.086E-8

Unit

Inclination (i)

Value

1.5715

1-sigma variation

2.699E-6

Unit

Long. of Ascending Node (Ω)

Value

47.8528

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

203.5228

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

349.09518

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.644128

1-sigma variation

Unit

Aphelion distance

Value

3.594633

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.023628

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.342001

1-sigma variation

Unit

MOID

Value

0.023104

1-sigma variation

Unit

Orbit Period

Value

1126.9684

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.71357E-16	1.83466E-16	2.12996E-15	3.15097E-15	5.17531E-14	-1.39223E-13
e	1.83466E-16	9.52613E-16	1.03342E-15	-3.81562E-14	1.64851E-13	-1.39210E-13
i	2.12996E-15	1.03342E-15	7.28333E-12	-3.39426E-10	3.40839E-10	-2.39635E-12
Ω	3.15097E-15	-3.81562E-14	-3.39426E-10	7.71363E-8	-7.71252E-8	1.63004E-11
ω	5.17531E-14	1.64851E-13	3.40839E-10	-7.71252E-8	7.71675E-8	-7.72216E-11
M	-1.39223E-13	-1.39210E-13	-2.39635E-12	1.63004E-11	-7.72216E-11	1.24504E-10

Date of computation: 2026-06-04 23:11 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

19.765

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

300 - 700*

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

2451

Unit

Source

[1]

Unobserved

Value

1011

Unit

Source

[1]

Normalized RMS of residuals

Value

0.537023

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-01-27.64083

Unit

Source

[2]

Last Observation

Value

2023-10-14.281997

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

256 (1)

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2017BP31 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-03-23 07:22	6.9	0.1773956	0.1772752	0.0000401
EARTH	1958-08-26 07:02	1.4	0.0314456	0.0314275	0.0000061
MARS	1968-01-06 22:02	< 1 min	0.0355740	0.0355600	0.0000047
MARS	1970-08-07 04:00	< 1 min	0.0056719	0.0056703	0.0000006
704 Interamnia	2013-06-08 02:19	< 1 min	0.0129728	0.0129720	0.0000003
EARTH	2017-02-26 19:36	< 1 s	0.1929050	0.1929048	0.0000001
EARTH	2026-08-28 23:42	< 1 min	0.0286032	0.0286026	0.0000002
VENUS	2032-08-24 18:48	< 1 min	0.0276419	0.0276402	0.0000006
VENUS	2035-09-23 19:52	< 1 min	0.0253825	0.0253819	0.0000002
VENUS	2045-01-29 14:05	5.2	0.0433347	0.0432929	0.0000139
VENUS	2048-03-05 12:06	2.8	0.0084421	0.0084338	0.0000028
EARTH	2054-03-06 15:07	29.5	0.0926522	0.0915742	0.0003594
EARTH	2091-03-10 11:40	49.9	0.0230843	0.0227265	0.0001391
EARTH	2100-08-31 09:28	311.8	0.0283030	0.0248681	0.0017607

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
319.76295873	67.38946579	0.02320600	MINIMUM
41.28067907	234.19985011	0.02656550	MINIMUM
0.82291909	151.24112507	0.37187228	SADDLE
0.76540482	331.12504102	1.62986588	SADDLE
180.14516677	330.24575289	2.61055935	SADDLE
180.13962290	150.24751123	4.61206756	MAXIMUM

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MOID Plots

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