| 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) |
| 2026-07-29 00:00 |
06:44:10.82 |
+21:24:53.1 |
HIP 32164 |
19.85 |
| 2026-07-29 12:00 |
06:44:12.73 |
+21:24:50.6 |
HIP 32164 |
20.25 |
| 2026-07-30 00:00 |
06:44:14.62 |
+21:24:48.0 |
HIP 32164 |
20.64 |
| 2026-07-30 12:00 |
06:44:16.51 |
+21:24:45.4 |
HIP 32164 |
21.04 |
| 2026-07-31 00:00 |
06:44:18.39 |
+21:24:42.8 |
HIP 32164 |
21.44 |
| 2026-07-31 12:00 |
06:44:20.27 |
+21:24:40.3 |
HIP 32164 |
21.84 |
| 2026-08-01 00:00 |
06:44:22.13 |
+21:24:37.7 |
HIP 32164 |
22.24 |
| 2026-08-01 12:00 |
06:44:23.99 |
+21:24:35.1 |
HIP 32164 |
22.63 |
| 2026-08-02 00:00 |
06:44:25.84 |
+21:24:32.6 |
HIP 32164 |
23.03 |
| 2026-08-02 12:00 |
06:44:27.68 |
+21:24:30.0 |
HIP 32164 |
23.43 |
| 2026-08-03 00:00 |
06:44:29.51 |
+21:24:27.4 |
HIP 32164 |
23.82 |
| 2026-08-03 12:00 |
06:44:31.34 |
+21:24:24.9 |
HIP 32164 |
24.22 |
| 2026-08-04 00:00 |
06:44:33.15 |
+21:24:22.3 |
HIP 32164 |
24.62 |
| 2026-08-04 12:00 |
06:44:34.96 |
+21:24:19.8 |
HIP 32164 |
25.01 |
| 2026-08-05 00:00 |
06:44:36.75 |
+21:24:17.2 |
HIP 32164 |
25.40 |
| 2026-08-05 12:00 |
06:44:38.54 |
+21:24:14.7 |
HIP 32164 |
25.79 |
| 2026-08-06 00:00 |
06:44:40.32 |
+21:24:12.1 |
HIP 32164 |
26.19 |
| 2026-08-06 12:00 |
06:44:42.09 |
+21:24:09.6 |
HIP 32164 |
26.57 |
| 2026-08-07 00:00 |
06:44:43.85 |
+21:24:07.0 |
HIP 32164 |
26.96 |
| 2026-08-07 12:00 |
06:44:45.60 |
+21:24:04.5 |
HIP 32164 |
27.35 |
| 2026-08-08 00:00 |
06:44:47.34 |
+21:24:01.9 |
HIP 32164 |
27.74 |
| 2026-08-08 12:00 |
06:44:49.07 |
+21:23:59.4 |
HIP 32164 |
28.12 |
| 2026-08-09 00:00 |
06:44:50.79 |
+21:23:56.9 |
HIP 32164 |
28.50 |
| 2026-08-09 12:00 |
06:44:52.50 |
+21:23:54.3 |
HIP 32164 |
28.88 |
| 2026-08-10 00:00 |
06:44:54.20 |
+21:23:51.8 |
HIP 32164 |
29.26 |
| 2026-08-10 12:00 |
06:44:55.89 |
+21:23:49.3 |
HIP 32164 |
29.64 |
| 2026-08-11 00:00 |
06:44:57.57 |
+21:23:46.8 |
HIP 32164 |
30.01 |
| 2026-08-11 12:00 |
06:44:59.24 |
+21:23:44.3 |
HIP 32164 |
30.39 |
| 2026-08-12 00:00 |
06:45:00.89 |
+21:23:41.8 |
HIP 32164 |
30.76 |
| 2026-08-12 12:00 |
06:45:02.54 |
+21:23:39.3 |
HIP 32164 |
31.13 |
| 2026-08-13 00:00 |
06:45:04.17 |
+21:23:36.8 |
HIP 32164 |
31.50 |
| 2026-08-13 12:00 |
06:45:05.80 |
+21:23:34.3 |
HIP 32164 |
31.86 |
| 2026-08-14 00:00 |
06:45:07.41 |
+21:23:31.8 |
HIP 32329 |
32.03 |
| 2026-08-14 12:00 |
06:45:09.01 |
+21:23:29.3 |
HIP 32329 |
32.02 |
| 2026-08-15 00:00 |
06:45:10.60 |
+21:23:26.9 |
HIP 32329 |
32.02 |
| 2026-08-15 12:00 |
06:45:12.18 |
+21:23:24.4 |
HIP 32329 |
32.02 |
| 2026-08-16 00:00 |
06:45:13.75 |
+21:23:21.9 |
HIP 32329 |
32.03 |
| 2026-08-16 12:00 |
06:45:15.30 |
+21:23:19.5 |
HIP 32329 |
32.04 |
| 2026-08-17 00:00 |
06:45:16.84 |
+21:23:17.0 |
HIP 32329 |
32.06 |
| 2026-08-17 12:00 |
06:45:18.37 |
+21:23:14.6 |
HIP 32329 |
32.08 |
| 2026-08-18 00:00 |
06:45:19.89 |
+21:23:12.2 |
HIP 32329 |
32.10 |
| 2026-08-18 12:00 |
06:45:21.40 |
+21:23:09.8 |
HIP 32329 |
32.13 |
| 2026-08-19 00:00 |
06:45:22.89 |
+21:23:07.3 |
HIP 32329 |
32.16 |