| 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) |
| 2026-06-01 00:00 |
06:40:14.29 |
+21:29:11.6 |
HIP 31848 |
32.60 |
| 2026-06-01 12:00 |
06:40:16.16 |
+21:29:10.0 |
HIP 31848 |
32.76 |
| 2026-06-02 00:00 |
06:40:18.03 |
+21:29:08.4 |
HIP 31848 |
32.93 |
| 2026-06-02 12:00 |
06:40:19.91 |
+21:29:06.8 |
HIP 31848 |
33.10 |
| 2026-06-03 00:00 |
06:40:21.80 |
+21:29:05.2 |
HIP 31848 |
33.28 |
| 2026-06-03 12:00 |
06:40:23.70 |
+21:29:03.6 |
HIP 31848 |
33.47 |
| 2026-06-04 00:00 |
06:40:25.60 |
+21:29:01.9 |
HIP 31848 |
33.66 |
| 2026-06-04 12:00 |
06:40:27.51 |
+21:29:00.2 |
HIP 31848 |
33.85 |
| 2026-06-05 00:00 |
06:40:29.43 |
+21:28:58.5 |
HIP 31848 |
34.06 |
| 2026-06-05 12:00 |
06:40:31.36 |
+21:28:56.8 |
HIP 31848 |
34.26 |
| 2026-06-06 00:00 |
06:40:33.29 |
+21:28:55.1 |
HIP 31848 |
34.48 |
| 2026-06-06 12:00 |
06:40:35.24 |
+21:28:53.4 |
HIP 32164 |
34.07 |
| 2026-06-07 00:00 |
06:40:37.18 |
+21:28:51.6 |
HIP 32164 |
33.63 |
| 2026-06-07 12:00 |
06:40:39.14 |
+21:28:49.9 |
HIP 32164 |
33.20 |
| 2026-06-08 00:00 |
06:40:41.10 |
+21:28:48.1 |
HIP 32164 |
32.75 |
| 2026-06-08 12:00 |
06:40:43.07 |
+21:28:46.3 |
HIP 32164 |
32.31 |
| 2026-06-09 00:00 |
06:40:45.04 |
+21:28:44.5 |
HIP 32164 |
31.87 |
| 2026-06-09 12:00 |
06:40:47.02 |
+21:28:42.7 |
HIP 32164 |
31.43 |
| 2026-06-10 00:00 |
06:40:49.01 |
+21:28:40.9 |
HIP 32164 |
30.98 |
| 2026-06-10 12:00 |
06:40:51.00 |
+21:28:39.0 |
HIP 32164 |
30.54 |
| 2026-06-11 00:00 |
06:40:53.00 |
+21:28:37.2 |
HIP 32164 |
30.09 |
| 2026-06-11 12:00 |
06:40:55.00 |
+21:28:35.3 |
HIP 32164 |
29.65 |
| 2026-06-12 00:00 |
06:40:57.01 |
+21:28:33.4 |
HIP 32164 |
29.20 |
| 2026-06-12 12:00 |
06:40:59.03 |
+21:28:31.5 |
HIP 32164 |
28.76 |
| 2026-06-13 00:00 |
06:41:01.05 |
+21:28:29.6 |
HIP 32164 |
28.31 |
| 2026-06-13 12:00 |
06:41:03.07 |
+21:28:27.6 |
HIP 32164 |
27.86 |
| 2026-06-14 00:00 |
06:41:05.11 |
+21:28:25.7 |
HIP 32164 |
27.41 |
| 2026-06-14 12:00 |
06:41:07.14 |
+21:28:23.7 |
HIP 32164 |
26.96 |
| 2026-06-15 00:00 |
06:41:09.18 |
+21:28:21.8 |
HIP 32164 |
26.52 |
| 2026-06-15 12:00 |
06:41:11.23 |
+21:28:19.8 |
HIP 32164 |
26.07 |
| 2026-06-16 00:00 |
06:41:13.28 |
+21:28:17.8 |
HIP 32164 |
25.62 |
| 2026-06-16 12:00 |
06:41:15.33 |
+21:28:15.8 |
HIP 32164 |
25.17 |
| 2026-06-17 00:00 |
06:41:17.39 |
+21:28:13.8 |
HIP 32164 |
24.72 |
| 2026-06-17 12:00 |
06:41:19.45 |
+21:28:11.7 |
HIP 32164 |
24.28 |
| 2026-06-18 00:00 |
06:41:21.52 |
+21:28:09.7 |
HIP 32164 |
23.83 |
| 2026-06-18 12:00 |
06:41:23.59 |
+21:28:07.6 |
HIP 32164 |
23.38 |
| 2026-06-19 00:00 |
06:41:25.66 |
+21:28:05.6 |
HIP 32164 |
22.94 |
| 2026-06-19 12:00 |
06:41:27.73 |
+21:28:03.5 |
HIP 32164 |
22.50 |
| 2026-06-20 00:00 |
06:41:29.81 |
+21:28:01.4 |
HIP 32164 |
22.05 |
| 2026-06-20 12:00 |
06:41:31.90 |
+21:27:59.3 |
HIP 32164 |
21.61 |
| 2026-06-21 00:00 |
06:41:33.98 |
+21:27:57.2 |
HIP 32164 |
21.17 |
| 2026-06-21 12:00 |
06:41:36.07 |
+21:27:55.0 |
HIP 32164 |
20.73 |
| 2026-06-22 00:00 |
06:41:38.16 |
+21:27:52.9 |
HIP 32164 |
20.29 |