| Parameter |
Value |
| Designation |
C/2002 B1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-20T00:07:40.019520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:13Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
24.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-02-09.0000000 |
| e |
0.77101055 |
| q (au) |
2.271129 |
| a (au) |
9.918053 |
| i (deg) |
51.021341 |
| Ω (om, deg) |
58.185425 |
| ω (w, deg) |
76.158399 |
| M (ma, deg) |
357.791001 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.865 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.865 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-05-12 00:00 |
01:05:10.58 |
-47:15:55.1 |
HIP 5188 |
23.31 |
| 2026-05-12 12:00 |
01:05:21.50 |
-47:16:10.8 |
HIP 5188 |
22.16 |
| 2026-05-13 00:00 |
01:05:32.37 |
-47:16:27.4 |
HIP 5188 |
21.10 |
| 2026-05-13 12:00 |
01:05:43.21 |
-47:16:44.8 |
HIP 5188 |
20.14 |
| 2026-05-14 00:00 |
01:05:54.00 |
-47:17:03.0 |
HIP 5188 |
19.31 |
| 2026-05-14 12:00 |
01:06:04.74 |
-47:17:22.0 |
HIP 5188 |
18.61 |
| 2026-05-15 00:00 |
01:06:15.44 |
-47:17:41.8 |
HIP 5188 |
18.06 |
| 2026-05-15 12:00 |
01:06:26.10 |
-47:18:02.5 |
HIP 5188 |
17.67 |
| 2026-05-16 00:00 |
01:06:36.70 |
-47:18:24.0 |
HIP 5188 |
17.46 |
| 2026-05-16 12:00 |
01:06:47.27 |
-47:18:46.2 |
HIP 5188 |
17.41 |
| 2026-05-17 00:00 |
01:06:57.78 |
-47:19:09.3 |
HIP 5188 |
17.55 |
| 2026-05-17 12:00 |
01:07:08.24 |
-47:19:33.2 |
HIP 5318 |
16.46 |
| 2026-05-18 00:00 |
01:07:18.66 |
-47:19:57.9 |
HIP 5318 |
15.21 |
| 2026-05-18 12:00 |
01:07:29.03 |
-47:20:23.5 |
HIP 5318 |
14.08 |
| 2026-05-19 00:00 |
01:07:39.34 |
-47:20:49.8 |
HIP 5318 |
13.09 |
| 2026-05-19 12:00 |
01:07:49.61 |
-47:21:16.9 |
HIP 5318 |
12.28 |
| 2026-05-20 00:00 |
01:07:59.83 |
-47:21:44.8 |
HIP 5318 |
11.67 |
| 2026-05-20 12:00 |
01:08:09.99 |
-47:22:13.6 |
HIP 5318 |
11.30 |
| 2026-05-21 00:00 |
01:08:20.10 |
-47:22:43.1 |
HIP 5318 |
11.19 |
| 2026-05-21 12:00 |
01:08:30.16 |
-47:23:13.4 |
HIP 5318 |
11.34 |
| 2026-05-22 00:00 |
01:08:40.16 |
-47:23:44.6 |
HIP 5318 |
11.75 |
| 2026-05-22 12:00 |
01:08:50.11 |
-47:24:16.5 |
HIP 5318 |
12.38 |
| 2026-05-23 00:00 |
01:09:00.01 |
-47:24:49.2 |
HIP 5318 |
13.20 |
| 2026-05-23 12:00 |
01:09:09.85 |
-47:25:22.7 |
HIP 5318 |
14.18 |
| 2026-05-24 00:00 |
01:09:19.64 |
-47:25:57.0 |
HIP 5318 |
15.28 |
| 2026-05-24 12:00 |
01:09:29.37 |
-47:26:32.0 |
HIP 5318 |
16.48 |
| 2026-05-25 00:00 |
01:09:39.04 |
-47:27:07.9 |
HIP 5545 |
16.37 |
| 2026-05-25 12:00 |
01:09:48.66 |
-47:27:44.5 |
HIP 5545 |
14.63 |
| 2026-05-26 00:00 |
01:09:58.22 |
-47:28:21.9 |
HIP 5545 |
12.90 |
| 2026-05-26 12:00 |
01:10:07.72 |
-47:29:00.1 |
HIP 5545 |
11.18 |
| 2026-05-27 00:00 |
01:10:17.16 |
-47:29:39.0 |
HIP 5545 |
9.46 |
| 2026-05-27 12:00 |
01:10:26.55 |
-47:30:18.8 |
HIP 5545 |
7.74 |
| 2026-05-28 00:00 |
01:10:35.87 |
-47:30:59.3 |
HIP 5545 |
6.03 |
| 2026-05-28 12:00 |
01:10:45.14 |
-47:31:40.5 |
HIP 5545 |
4.33 |
| 2026-05-29 00:00 |
01:10:54.34 |
-47:32:22.6 |
HIP 5545 |
2.63 |
| 2026-05-29 12:00 |
01:11:03.48 |
-47:33:05.4 |
HIP 5545 |
0.96 |
| 2026-05-30 00:00 |
01:11:12.57 |
-47:33:48.9 |
HIP 5545 |
0.82 |
| 2026-05-30 12:00 |
01:11:21.59 |
-47:34:33.2 |
HIP 5545 |
2.48 |
| 2026-05-31 00:00 |
01:11:30.54 |
-47:35:18.3 |
HIP 5545 |
4.16 |
| 2026-05-31 12:00 |
01:11:39.44 |
-47:36:04.1 |
HIP 5545 |
5.84 |
| 2026-06-01 00:00 |
01:11:48.27 |
-47:36:50.7 |
HIP 5545 |
7.51 |
| 2026-06-01 12:00 |
01:11:57.04 |
-47:37:38.0 |
HIP 5545 |
9.18 |
| 2026-06-02 00:00 |
01:12:05.74 |
-47:38:26.1 |
HIP 5545 |
10.85 |