| 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) |
| 2026-03-26 00:00 |
00:46:13.02 |
-47:50:50.7 |
HIP 3686 |
13.40 |
| 2026-03-26 12:00 |
00:46:25.46 |
-47:49:52.9 |
HIP 3686 |
12.59 |
| 2026-03-27 00:00 |
00:46:37.92 |
-47:48:55.8 |
HIP 3686 |
12.15 |
| 2026-03-27 12:00 |
00:46:50.38 |
-47:47:59.4 |
HIP 3686 |
12.13 |
| 2026-03-28 00:00 |
00:47:02.86 |
-47:47:03.7 |
HIP 3686 |
12.52 |
| 2026-03-28 12:00 |
00:47:15.34 |
-47:46:08.7 |
HIP 3686 |
13.28 |
| 2026-03-29 00:00 |
00:47:27.82 |
-47:45:14.5 |
HIP 3686 |
14.36 |
| 2026-03-29 12:00 |
00:47:40.32 |
-47:44:20.9 |
HIP 3686 |
15.69 |
| 2026-03-30 00:00 |
00:47:52.82 |
-47:43:28.1 |
HIP 3686 |
17.21 |
| 2026-03-30 12:00 |
00:48:05.33 |
-47:42:36.0 |
HIP 3686 |
18.87 |
| 2026-03-31 00:00 |
00:48:17.84 |
-47:41:44.6 |
HIP 3835 |
19.44 |
| 2026-03-31 12:00 |
00:48:30.36 |
-47:40:54.0 |
HIP 3835 |
17.73 |
| 2026-04-01 00:00 |
00:48:42.88 |
-47:40:04.0 |
HIP 3835 |
16.16 |
| 2026-04-01 12:00 |
00:48:55.40 |
-47:39:14.8 |
HIP 3835 |
14.80 |
| 2026-04-02 00:00 |
00:49:07.93 |
-47:38:26.4 |
HIP 3835 |
13.68 |
| 2026-04-02 12:00 |
00:49:20.46 |
-47:37:38.6 |
HIP 3835 |
12.88 |
| 2026-04-03 00:00 |
00:49:32.99 |
-47:36:51.6 |
HIP 3835 |
12.46 |
| 2026-04-03 12:00 |
00:49:45.52 |
-47:36:05.4 |
HIP 3835 |
12.45 |
| 2026-04-04 00:00 |
00:49:58.06 |
-47:35:19.9 |
HIP 3835 |
12.86 |
| 2026-04-04 12:00 |
00:50:10.59 |
-47:34:35.1 |
HIP 3835 |
13.63 |
| 2026-04-05 00:00 |
00:50:23.13 |
-47:33:51.1 |
HIP 3835 |
14.72 |
| 2026-04-05 12:00 |
00:50:35.66 |
-47:33:07.8 |
HIP 3835 |
16.06 |
| 2026-04-06 00:00 |
00:50:48.19 |
-47:32:25.2 |
HIP 3835 |
17.59 |
| 2026-04-06 12:00 |
00:51:00.73 |
-47:31:43.4 |
HIP 4018 |
18.11 |
| 2026-04-07 00:00 |
00:51:13.26 |
-47:31:02.4 |
HIP 4018 |
18.33 |
| 2026-04-07 12:00 |
00:51:25.78 |
-47:30:22.1 |
HIP 4018 |
18.79 |
| 2026-04-08 00:00 |
00:51:38.30 |
-47:29:42.6 |
HIP 4018 |
19.48 |
| 2026-04-08 12:00 |
00:51:50.82 |
-47:29:03.8 |
HIP 4018 |
20.38 |
| 2026-04-09 00:00 |
00:52:03.34 |
-47:28:25.8 |
HIP 4018 |
21.45 |
| 2026-04-09 12:00 |
00:52:15.85 |
-47:27:48.6 |
HIP 4018 |
22.67 |
| 2026-04-10 00:00 |
00:52:28.35 |
-47:27:12.1 |
HIP 4018 |
24.03 |
| 2026-04-10 12:00 |
00:52:40.85 |
-47:26:36.4 |
HIP 4018 |
25.48 |
| 2026-04-11 00:00 |
00:52:53.35 |
-47:26:01.5 |
HIP 4311 |
23.51 |
| 2026-04-11 12:00 |
00:53:05.83 |
-47:25:27.3 |
HIP 4311 |
21.37 |
| 2026-04-12 00:00 |
00:53:18.31 |
-47:24:53.9 |
HIP 4311 |
19.24 |
| 2026-04-12 12:00 |
00:53:30.78 |
-47:24:21.3 |
HIP 4311 |
17.12 |
| 2026-04-13 00:00 |
00:53:43.24 |
-47:23:49.5 |
HIP 4311 |
15.02 |
| 2026-04-13 12:00 |
00:53:55.69 |
-47:23:18.4 |
HIP 4311 |
12.95 |
| 2026-04-14 00:00 |
00:54:08.13 |
-47:22:48.1 |
HIP 4311 |
10.91 |
| 2026-04-14 12:00 |
00:54:20.56 |
-47:22:18.7 |
HIP 4311 |
8.93 |
| 2026-04-15 00:00 |
00:54:32.97 |
-47:21:50.0 |
HIP 4311 |
7.06 |
| 2026-04-15 12:00 |
00:54:45.38 |
-47:21:22.1 |
HIP 4311 |
5.39 |
| 2026-04-16 00:00 |
00:54:57.77 |
-47:20:54.9 |
HIP 4311 |
4.18 |