Hirayama

01999, 1935 GF, 1935GF, 1940 EH, 1940EH, 1951 EY1, 1951EY1, 1951 FA, 1951FA, 1965 UF, 1965UF, 1969 NB, 1969NB, 1973 DR, 1973DR, 1975 NE, 1975NE, J35G00F, J40E00H, J51E01Y, J51F00A, J65U00F, J69N00B, J73D00R, J75N00E

All data for this body: [vot]

MPC data
Name (number) Hirayama (1999)
a 3.11278
e 0.11872
i / sin(i) 12.5379 / 0.21709
q 2.74322
Q 3.48233
ω 355.9652
Node 147.8372
m 182.8175
n 0.1795
Epoch 2460800.5
nobs 7586
nopp 38
Years observed 1940-2025
rms 0.53
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.116
ep 0.146
sin(ip) 0.200
G 0.150
H 11.110
Mass
D 36.41 0.292
pV 0.086 0.0025
Value
Rotational Period 15.600
Period quality 3
Spectral Class C
Spectral Class Score 25.654
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1160 0.1459 0.1998 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
29.10 0.899 0.899 Ryan&Woodward 2010AJ....140..933R IRAS-STM
30.08 7.970 7.970 Nugent 2016AJ....152...63N NEATM
31.46 8.707 8.707 Masiero 2017AJ....154..168M NEATM
32.54 8.730 8.730 Masiero 2020PSJ.....1....5M NEATM
33.16 3.320 3.320 Ali-Lagoa 2018A&A...612A..85A NEATM
33.95 2.100 2.100 Tedesco 2002AJ....123.1056T STM
35.68 0.550 0.550 Usui 2011PASJ...63.1117U NEATM
37.21 3.720 3.720 Ali-Lagoa 2018A&A...612A..85A NEATM
37.58 7.520 7.520 Ali-Lagoa 2018A&A...612A..85A NEATM
38.05 1.443 1.443 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
38.28 0.400 0.400 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.053 0.0050 0.0050 Masiero 2012ApJ...759L...8M NEATM
0.059 0.0240 0.0240 Ali-Lagoa 2018A&A...612A..85A NEATM
0.060 0.0120 0.0120 Ali-Lagoa 2018A&A...612A..85A NEATM
0.069 0.0850 0.0850 Masiero 2020PSJ.....1....5M NEATM
0.070 0.0054 0.0054 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.075 0.0150 0.0150 Ali-Lagoa 2018A&A...612A..85A NEATM
0.077 0.0530 0.0530 Masiero 2017AJ....154..168M NEATM
0.080 0.1000 0.1000 Nugent 2016AJ....152...63N NEATM
0.088 0.0120 0.0120 Tedesco 2002AJ....123.1056T STM
0.120 0.0040 0.0040 Ryan&Woodward 2010AJ....140..933R IRAS-STM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
11.11 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
13.5921 2 Synodic Hamanowa LCDB Lightcurve
15.43 2 Synodic Behrend LCDB Lightcurve
15.62385 2 Sidereal Durech 2019A&A...631A...2D Model
15.63 3- Synodic Menke 2008MPBu...35..155M Lightcurve
15.63 3 Synodic Behrend LCDB Lightcurve
2.0 Synodic Erasmus 2018ApJS..237...19E Lightcurve
2.0 Synodic Erasmus 2019ApJS..242...15E Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
C 0.57 Bus VIS Carvano 2010A&A...510A..43C PHOT
C 0.983 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
C 0.993000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT
C 0.993000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT
C C 0.2553 0.3580 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C C 0.5281 0.3580 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
Caa Tholen VIS Lazzaro 2004Icar..172..179L SPEC
Ch Bus VIS Lazzaro 2004Icar..172..179L SPEC
S 1.000000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC