| Parameter |
Value |
| Designation |
P/2000 R2 (LINEAR) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2000-09-12T15:47:05.478720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:05Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
19.300 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-09-20.0000000 |
| e |
0.58365455 |
| q (au) |
1.389967 |
| a (au) |
3.338494 |
| i (deg) |
3.216342 |
| Ω (om, deg) |
187.499425 |
| ω (w, deg) |
147.063490 |
| M (ma, deg) |
1.186343 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.097 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.097 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.987 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
01:42:23.99 |
+03:33:39.2 |
HIP 7860 |
21.34 |
| 2026-03-26 12:00 |
01:43:33.81 |
+03:39:27.3 |
HIP 8090 |
6.07 |
| 2026-03-27 00:00 |
01:44:43.55 |
+03:45:14.0 |
HIP 8211 |
15.92 |
| 2026-03-27 12:00 |
01:45:53.20 |
+03:50:59.5 |
HIP 8211 |
11.20 |
| 2026-03-28 00:00 |
01:47:02.77 |
+03:56:43.7 |
HIP 8329 |
5.11 |
| 2026-03-28 12:00 |
01:48:12.25 |
+04:02:26.5 |
HIP 8329 |
14.53 |
| 2026-03-29 00:00 |
01:49:21.66 |
+04:08:08.1 |
HIP 8605 |
25.29 |
| 2026-03-29 12:00 |
01:50:30.98 |
+04:13:48.3 |
HIP 8605 |
7.50 |
| 2026-03-30 00:00 |
01:51:40.22 |
+04:19:27.2 |
HIP 8605 |
11.59 |
| 2026-03-30 12:00 |
01:52:49.38 |
+04:25:04.8 |
HIP 8765 |
14.71 |
| 2026-03-31 00:00 |
01:53:58.46 |
+04:30:41.0 |
HIP 8765 |
19.87 |
| 2026-03-31 12:00 |
01:55:07.46 |
+04:36:15.9 |
HIP 8765 |
35.04 |
| 2026-04-01 00:00 |
01:56:16.38 |
+04:41:49.4 |
HIP 9096 |
47.90 |
| 2026-04-01 12:00 |
01:57:25.22 |
+04:47:21.5 |
HIP 9330 |
37.69 |
| 2026-04-02 00:00 |
01:58:33.98 |
+04:52:52.3 |
HIP 9330 |
25.47 |
| 2026-04-02 12:00 |
01:59:42.66 |
+04:58:21.7 |
HIP 9330 |
22.90 |
| 2026-04-03 00:00 |
02:00:51.27 |
+05:03:49.7 |
HIP 9431 |
16.89 |
| 2026-04-03 12:00 |
02:01:59.79 |
+05:09:16.3 |
HIP 9431 |
16.93 |
| 2026-04-04 00:00 |
02:03:08.24 |
+05:14:41.5 |
HIP 9611 |
24.09 |
| 2026-04-04 12:00 |
02:04:16.61 |
+05:20:05.3 |
HIP 9791 |
24.57 |
| 2026-04-05 00:00 |
02:05:24.90 |
+05:25:27.7 |
HIP 9791 |
10.35 |
| 2026-04-05 12:00 |
02:06:33.11 |
+05:30:48.7 |
HIP 9791 |
15.66 |
| 2026-04-06 00:00 |
02:07:41.25 |
+05:36:08.2 |
HIP 9926 |
23.01 |
| 2026-04-06 12:00 |
02:08:49.31 |
+05:41:26.3 |
HIP 10056 |
9.20 |
| 2026-04-07 00:00 |
02:09:57.29 |
+05:46:43.0 |
HIP 10056 |
9.81 |
| 2026-04-07 12:00 |
02:11:05.20 |
+05:51:58.2 |
HIP 10153 |
7.54 |
| 2026-04-08 00:00 |
02:12:13.03 |
+05:57:12.0 |
HIP 10153 |
25.20 |
| 2026-04-08 12:00 |
02:13:20.79 |
+06:02:24.3 |
HIP 10419 |
13.73 |
| 2026-04-09 00:00 |
02:14:28.47 |
+06:07:35.2 |
HIP 10448 |
2.77 |
| 2026-04-09 12:00 |
02:15:36.08 |
+06:12:44.6 |
HIP 10448 |
15.15 |
| 2026-04-10 00:00 |
02:16:43.61 |
+06:17:52.5 |
HIP 10616 |
13.91 |
| 2026-04-10 12:00 |
02:17:51.07 |
+06:22:58.9 |
HIP 10616 |
19.59 |
| 2026-04-11 00:00 |
02:18:58.45 |
+06:28:03.9 |
HIP 10747 |
17.59 |
| 2026-04-11 12:00 |
02:20:05.76 |
+06:33:07.3 |
HIP 10747 |
28.63 |
| 2026-04-12 00:00 |
02:21:12.99 |
+06:38:09.2 |
HIP 11151 |
33.24 |
| 2026-04-12 12:00 |
02:22:20.15 |
+06:43:09.7 |
HIP 11151 |
17.94 |
| 2026-04-13 00:00 |
02:23:27.24 |
+06:48:08.6 |
HIP 11151 |
12.04 |
| 2026-04-13 12:00 |
02:24:34.25 |
+06:53:06.0 |
HIP 11151 |
23.90 |
| 2026-04-14 00:00 |
02:25:41.18 |
+06:58:01.9 |
HIP 11312 |
15.81 |
| 2026-04-14 12:00 |
02:26:48.05 |
+07:02:56.2 |
HIP 11312 |
20.64 |
| 2026-04-15 00:00 |
02:27:54.84 |
+07:07:49.0 |
HIP 11563 |
24.62 |
| 2026-04-15 12:00 |
02:29:01.55 |
+07:12:40.2 |
HIP 11563 |
23.84 |
| 2026-04-16 00:00 |
02:30:08.20 |
+07:17:29.9 |
HIP 11563 |
33.52 |