| Parameter |
Value |
| Designation |
C/2000 B2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-11-10T01:23:20.175360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:03Z |
| Obs used |
86 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-02-10.0000000 |
| e |
0.99949095 |
| q (au) |
3.776151 |
| a (au) |
7417.993350 |
| i (deg) |
93.648730 |
| Ω (om, deg) |
284.990983 |
| ω (w, deg) |
154.593587 |
| M (ma, deg) |
0.000142 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.297 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.297 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.997 |
| 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 |
22:16:35.75 |
-76:52:27.6 |
HIP 109814 |
8.09 |
| 2026-05-12 12:00 |
22:16:37.30 |
-76:52:59.3 |
HIP 109814 |
7.91 |
| 2026-05-13 00:00 |
22:16:38.77 |
-76:53:31.1 |
HIP 109814 |
7.76 |
| 2026-05-13 12:00 |
22:16:40.16 |
-76:54:03.0 |
HIP 109814 |
7.64 |
| 2026-05-14 00:00 |
22:16:41.45 |
-76:54:35.0 |
HIP 109814 |
7.56 |
| 2026-05-14 12:00 |
22:16:42.66 |
-76:55:07.1 |
HIP 109814 |
7.50 |
| 2026-05-15 00:00 |
22:16:43.79 |
-76:55:39.3 |
HIP 109814 |
7.48 |
| 2026-05-15 12:00 |
22:16:44.82 |
-76:56:11.6 |
HIP 109814 |
7.49 |
| 2026-05-16 00:00 |
22:16:45.77 |
-76:56:44.0 |
HIP 109814 |
7.53 |
| 2026-05-16 12:00 |
22:16:46.63 |
-76:57:16.5 |
HIP 109814 |
7.61 |
| 2026-05-17 00:00 |
22:16:47.41 |
-76:57:49.0 |
HIP 109814 |
7.72 |
| 2026-05-17 12:00 |
22:16:48.09 |
-76:58:21.6 |
HIP 109814 |
7.87 |
| 2026-05-18 00:00 |
22:16:48.69 |
-76:58:54.4 |
HIP 109814 |
8.04 |
| 2026-05-18 12:00 |
22:16:49.20 |
-76:59:27.2 |
HIP 109814 |
8.24 |
| 2026-05-19 00:00 |
22:16:49.61 |
-77:00:00.0 |
HIP 109814 |
8.47 |
| 2026-05-19 12:00 |
22:16:49.94 |
-77:00:33.0 |
HIP 109814 |
8.72 |
| 2026-05-20 00:00 |
22:16:50.18 |
-77:01:06.0 |
HIP 109814 |
9.00 |
| 2026-05-20 12:00 |
22:16:50.33 |
-77:01:39.1 |
HIP 109814 |
9.29 |
| 2026-05-21 00:00 |
22:16:50.39 |
-77:02:12.2 |
HIP 109814 |
9.61 |
| 2026-05-21 12:00 |
22:16:50.36 |
-77:02:45.4 |
HIP 109814 |
9.94 |
| 2026-05-22 00:00 |
22:16:50.24 |
-77:03:18.7 |
HIP 109814 |
10.29 |
| 2026-05-22 12:00 |
22:16:50.03 |
-77:03:52.0 |
HIP 109814 |
10.65 |
| 2026-05-23 00:00 |
22:16:49.73 |
-77:04:25.4 |
HIP 109814 |
11.03 |
| 2026-05-23 12:00 |
22:16:49.34 |
-77:04:58.8 |
HIP 109814 |
11.41 |
| 2026-05-24 00:00 |
22:16:48.86 |
-77:05:32.3 |
HIP 109814 |
11.81 |
| 2026-05-24 12:00 |
22:16:48.28 |
-77:06:05.8 |
HIP 109814 |
12.22 |
| 2026-05-25 00:00 |
22:16:47.62 |
-77:06:39.4 |
HIP 109814 |
12.64 |
| 2026-05-25 12:00 |
22:16:46.86 |
-77:07:13.0 |
HIP 109814 |
13.07 |
| 2026-05-26 00:00 |
22:16:46.02 |
-77:07:46.6 |
HIP 109814 |
13.50 |
| 2026-05-26 12:00 |
22:16:45.08 |
-77:08:20.3 |
HIP 109814 |
13.94 |
| 2026-05-27 00:00 |
22:16:44.05 |
-77:08:54.0 |
HIP 109814 |
14.39 |
| 2026-05-27 12:00 |
22:16:42.93 |
-77:09:27.7 |
HIP 109814 |
14.84 |
| 2026-05-28 00:00 |
22:16:41.72 |
-77:10:01.5 |
HIP 109814 |
15.30 |
| 2026-05-28 12:00 |
22:16:40.41 |
-77:10:35.3 |
HIP 109814 |
15.76 |
| 2026-05-29 00:00 |
22:16:39.02 |
-77:11:09.1 |
HIP 109814 |
16.23 |
| 2026-05-29 12:00 |
22:16:37.53 |
-77:11:42.9 |
HIP 109814 |
16.71 |
| 2026-05-30 00:00 |
22:16:35.95 |
-77:12:16.8 |
HIP 109814 |
17.18 |
| 2026-05-30 12:00 |
22:16:34.27 |
-77:12:50.7 |
HIP 109814 |
17.66 |
| 2026-05-31 00:00 |
22:16:32.51 |
-77:13:24.5 |
HIP 109848 |
17.62 |
| 2026-05-31 12:00 |
22:16:30.65 |
-77:13:58.4 |
HIP 109848 |
17.05 |
| 2026-06-01 00:00 |
22:16:28.70 |
-77:14:32.3 |
HIP 109848 |
16.48 |
| 2026-06-01 12:00 |
22:16:26.66 |
-77:15:06.2 |
HIP 109848 |
15.91 |
| 2026-06-02 00:00 |
22:16:24.52 |
-77:15:40.1 |
HIP 109848 |
15.34 |