| Parameter |
Value |
| Designation |
C/1992 B1 (Bradfield) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-03-19T12:58:11.899200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
19 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1992-02-10.0000000 |
| e |
0.99992571 |
| q (au) |
0.500109 |
| a (au) |
6732.201164 |
| i (deg) |
20.237830 |
| Ω (om, deg) |
275.347033 |
| ω (w, deg) |
15.346028 |
| M (ma, deg) |
359.999931 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.662 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.662 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
06:46:28.50 |
+21:20:56.1 |
HIP 32571 |
27.57 |
| 2026-09-20 12:00 |
06:46:29.00 |
+21:20:54.5 |
HIP 32571 |
27.52 |
| 2026-09-21 00:00 |
06:46:29.48 |
+21:20:53.0 |
HIP 32571 |
27.46 |
| 2026-09-21 12:00 |
06:46:29.94 |
+21:20:51.4 |
HIP 32571 |
27.41 |
| 2026-09-22 00:00 |
06:46:30.39 |
+21:20:49.9 |
HIP 32571 |
27.36 |
| 2026-09-22 12:00 |
06:46:30.81 |
+21:20:48.4 |
HIP 32571 |
27.32 |
| 2026-09-23 00:00 |
06:46:31.22 |
+21:20:46.9 |
HIP 32571 |
27.27 |
| 2026-09-23 12:00 |
06:46:31.62 |
+21:20:45.5 |
HIP 32571 |
27.23 |
| 2026-09-24 00:00 |
06:46:31.99 |
+21:20:44.0 |
HIP 32571 |
27.19 |
| 2026-09-24 12:00 |
06:46:32.35 |
+21:20:42.6 |
HIP 32571 |
27.16 |
| 2026-09-25 00:00 |
06:46:32.69 |
+21:20:41.2 |
HIP 32571 |
27.13 |
| 2026-09-25 12:00 |
06:46:33.01 |
+21:20:39.8 |
HIP 32571 |
27.10 |
| 2026-09-26 00:00 |
06:46:33.31 |
+21:20:38.4 |
HIP 32571 |
27.07 |
| 2026-09-26 12:00 |
06:46:33.60 |
+21:20:37.1 |
HIP 32571 |
27.04 |
| 2026-09-27 00:00 |
06:46:33.86 |
+21:20:35.7 |
HIP 32571 |
27.02 |
| 2026-09-27 12:00 |
06:46:34.11 |
+21:20:34.4 |
HIP 32571 |
27.00 |
| 2026-09-28 00:00 |
06:46:34.34 |
+21:20:33.1 |
HIP 32571 |
26.98 |
| 2026-09-28 12:00 |
06:46:34.56 |
+21:20:31.8 |
HIP 32571 |
26.97 |
| 2026-09-29 00:00 |
06:46:34.75 |
+21:20:30.6 |
HIP 32571 |
26.96 |
| 2026-09-29 12:00 |
06:46:34.93 |
+21:20:29.3 |
HIP 32571 |
26.95 |
| 2026-09-30 00:00 |
06:46:35.09 |
+21:20:28.1 |
HIP 32571 |
26.94 |
| 2026-09-30 12:00 |
06:46:35.23 |
+21:20:26.9 |
HIP 32571 |
26.94 |
| 2026-10-01 00:00 |
06:46:35.35 |
+21:20:25.7 |
HIP 32571 |
26.93 |
| 2026-10-01 12:00 |
06:46:35.46 |
+21:20:24.6 |
HIP 32571 |
26.93 |
| 2026-10-02 00:00 |
06:46:35.54 |
+21:20:23.4 |
HIP 32571 |
26.94 |
| 2026-10-02 12:00 |
06:46:35.61 |
+21:20:22.3 |
HIP 32571 |
26.94 |
| 2026-10-03 00:00 |
06:46:35.66 |
+21:20:21.2 |
HIP 32571 |
26.95 |
| 2026-10-03 12:00 |
06:46:35.69 |
+21:20:20.1 |
HIP 32571 |
26.96 |
| 2026-10-04 00:00 |
06:46:35.70 |
+21:20:19.1 |
HIP 32571 |
26.97 |
| 2026-10-04 12:00 |
06:46:35.70 |
+21:20:18.0 |
HIP 32571 |
26.98 |
| 2026-10-05 00:00 |
06:46:35.67 |
+21:20:17.0 |
HIP 32571 |
27.00 |
| 2026-10-05 12:00 |
06:46:35.63 |
+21:20:16.0 |
HIP 32571 |
27.02 |
| 2026-10-06 00:00 |
06:46:35.57 |
+21:20:15.0 |
HIP 32571 |
27.04 |
| 2026-10-06 12:00 |
06:46:35.49 |
+21:20:14.1 |
HIP 32571 |
27.07 |
| 2026-10-07 00:00 |
06:46:35.39 |
+21:20:13.1 |
HIP 32571 |
27.09 |
| 2026-10-07 12:00 |
06:46:35.27 |
+21:20:12.2 |
HIP 32571 |
27.12 |
| 2026-10-08 00:00 |
06:46:35.14 |
+21:20:11.3 |
HIP 32571 |
27.15 |
| 2026-10-08 12:00 |
06:46:34.98 |
+21:20:10.4 |
HIP 32571 |
27.19 |
| 2026-10-09 00:00 |
06:46:34.81 |
+21:20:09.6 |
HIP 32571 |
27.22 |
| 2026-10-09 12:00 |
06:46:34.62 |
+21:20:08.7 |
HIP 32571 |
27.26 |
| 2026-10-10 00:00 |
06:46:34.41 |
+21:20:07.9 |
HIP 32571 |
27.30 |
| 2026-10-10 12:00 |
06:46:34.18 |
+21:20:07.1 |
HIP 32571 |
27.35 |
| 2026-10-11 00:00 |
06:46:33.94 |
+21:20:06.4 |
HIP 32571 |
27.39 |