Erfordia

01254, 1931 BE, 1931BE, 1932 JA, 1932JA, 1971 KG, 1971KG, 1974 XR, 1974XR, J31B00E, J32J00A, J71K00G, J74X00R

All data for this body: [vot]

MPC data
Name (number) Erfordia (1254)
a 3.13741
e 0.02495
i / sin(i) 7.0916 / 0.12346
q 3.05914
Q 3.21567
ω 246.1044
Node 287.5143
m 313.8564
n 0.1774
Epoch 2460800.5
nobs 8286
nopp 48
Years observed 1931-2025
rms 0.53
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.135
ep 0.062
sin(ip) 0.145
G 0.150
H 10.700
Mass
D 49.78 0.093
pV 0.033 0.0021
Value
Rotational Period 12.280
Period quality 3
Spectral Class X
Spectral Class Score 19.348
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1348 0.0622 0.1446 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
39.19 0.220 0.220 Masiero 2012ApJ...759L...8M NEATM
43.92 4.527 4.527 Ryan&Woodward 2010AJ....140..933R IRAS-STM
45.48 5.400 5.400 Tedesco 2002AJ....123.1056T STM
46.84 4.680 4.680 Ali-Lagoa 2018A&A...612A..85A NEATM
47.13 15.850 15.850 Nugent 2016AJ....152...63N NEATM
47.92 16.840 16.840 Nugent 2016AJ....152...63N NEATM
50.69 0.790 0.790 Usui 2011PASJ...63.1117U NEATM
50.77 5.080 5.080 Ali-Lagoa 2018A&A...612A..85A NEATM
51.54 0.110 0.110 Masiero 2014ApJ...791..121M NEATM
51.56 3.096 3.096 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
56.11 0.297 0.297 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.027 0.0030 0.0030 Masiero 2011ApJ...741...68M NEATM
0.030 0.0100 0.0100 Masiero 2014ApJ...791..121M NEATM
0.033 0.0039 0.0039 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.040 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.040 0.0500 0.0500 Nugent 2016AJ....152...63N NEATM
0.041 0.0120 0.0120 Tedesco 2002AJ....123.1056T STM
0.048 0.0100 0.0100 Ali-Lagoa 2018A&A...612A..85A NEATM
0.049 0.0116 0.0116 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.056 0.0110 0.0110 Ali-Lagoa 2018A&A...612A..85A NEATM
0.073 0.0140 0.0140 Masiero 2012ApJ...759L...8M NEATM
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
10.70 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
12.216 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
12.28257 2 Sidereal Durech 2019A&A...631A...2D Model
12.2826 2 Sidereal Durech 2023A&A...675A..24D Model
12.287 3 Synodic Brinsfield 2009MPBu...36..127B Lightcurve
12.31 2 Synodic Chang 2015ApJS..219...27C Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C None Bus VIS Carvano 2010A&A...510A..43C PHOT
X DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
X X 0.2418 0.7920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.6635 0.7920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.9861 0.7920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT