| Parameter |
Value |
| Designation |
C/2010 FB87 (WISE-Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-11-07T09:21:42.255360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
613 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-05-28.0000000 |
| e |
0.99050085 |
| q (au) |
2.842763 |
| a (au) |
299.264939 |
| i (deg) |
107.625358 |
| Ω (om, deg) |
89.902192 |
| ω (w, deg) |
265.025840 |
| M (ma, deg) |
0.038382 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.840 + 3.477\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.840 |
| n |
3.477 |
| gf |
1.000 |
| gb |
-0.812 |
| k |
0.800 |
| 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 |
03:16:43.29 |
+67:10:20.5 |
HIP 15277 |
5.38 |
| 2026-05-12 12:00 |
03:16:51.73 |
+67:10:31.8 |
HIP 15277 |
5.27 |
| 2026-05-13 00:00 |
03:17:00.17 |
+67:10:43.4 |
HIP 15277 |
5.31 |
| 2026-05-13 12:00 |
03:17:08.61 |
+67:10:55.4 |
HIP 15277 |
5.48 |
| 2026-05-14 00:00 |
03:17:17.05 |
+67:11:07.6 |
HIP 15277 |
5.77 |
| 2026-05-14 12:00 |
03:17:25.49 |
+67:11:20.2 |
HIP 15277 |
6.17 |
| 2026-05-15 00:00 |
03:17:33.94 |
+67:11:33.1 |
HIP 15277 |
6.66 |
| 2026-05-15 12:00 |
03:17:42.37 |
+67:11:46.3 |
HIP 15277 |
7.23 |
| 2026-05-16 00:00 |
03:17:50.81 |
+67:11:59.8 |
HIP 15277 |
7.84 |
| 2026-05-16 12:00 |
03:17:59.24 |
+67:12:13.6 |
HIP 15277 |
8.51 |
| 2026-05-17 00:00 |
03:18:07.67 |
+67:12:27.7 |
HIP 15482 |
8.67 |
| 2026-05-17 12:00 |
03:18:16.10 |
+67:12:42.2 |
HIP 15482 |
7.83 |
| 2026-05-18 00:00 |
03:18:24.52 |
+67:12:56.9 |
HIP 15482 |
6.98 |
| 2026-05-18 12:00 |
03:18:32.94 |
+67:13:12.0 |
HIP 15482 |
6.13 |
| 2026-05-19 00:00 |
03:18:41.35 |
+67:13:27.4 |
HIP 15482 |
5.29 |
| 2026-05-19 12:00 |
03:18:49.75 |
+67:13:43.1 |
HIP 15482 |
4.44 |
| 2026-05-20 00:00 |
03:18:58.15 |
+67:13:59.1 |
HIP 15482 |
3.61 |
| 2026-05-20 12:00 |
03:19:06.54 |
+67:14:15.3 |
HIP 15482 |
2.79 |
| 2026-05-21 00:00 |
03:19:14.92 |
+67:14:31.9 |
HIP 15482 |
2.00 |
| 2026-05-21 12:00 |
03:19:23.29 |
+67:14:48.8 |
HIP 15482 |
1.29 |
| 2026-05-22 00:00 |
03:19:31.66 |
+67:15:06.1 |
HIP 15482 |
0.92 |
| 2026-05-22 12:00 |
03:19:40.01 |
+67:15:23.6 |
HIP 15482 |
1.22 |
| 2026-05-23 00:00 |
03:19:48.35 |
+67:15:41.4 |
HIP 15482 |
1.91 |
| 2026-05-23 12:00 |
03:19:56.69 |
+67:15:59.5 |
HIP 15482 |
2.70 |
| 2026-05-24 00:00 |
03:20:05.01 |
+67:16:17.9 |
HIP 15482 |
3.52 |
| 2026-05-24 12:00 |
03:20:13.32 |
+67:16:36.5 |
HIP 15482 |
4.36 |
| 2026-05-25 00:00 |
03:20:21.62 |
+67:16:55.5 |
HIP 15482 |
5.21 |
| 2026-05-25 12:00 |
03:20:29.91 |
+67:17:14.8 |
HIP 15482 |
6.06 |
| 2026-05-26 00:00 |
03:20:38.18 |
+67:17:34.4 |
HIP 15482 |
6.92 |
| 2026-05-26 12:00 |
03:20:46.44 |
+67:17:54.2 |
HIP 15482 |
7.78 |
| 2026-05-27 00:00 |
03:20:54.69 |
+67:18:14.4 |
HIP 15482 |
8.64 |
| 2026-05-27 12:00 |
03:21:02.92 |
+67:18:34.8 |
HIP 15482 |
9.50 |
| 2026-05-28 00:00 |
03:21:11.14 |
+67:18:55.5 |
HIP 15482 |
10.36 |
| 2026-05-28 12:00 |
03:21:19.34 |
+67:19:16.5 |
HIP 15482 |
11.23 |
| 2026-05-29 00:00 |
03:21:27.53 |
+67:19:37.8 |
HIP 15482 |
12.09 |
| 2026-05-29 12:00 |
03:21:35.70 |
+67:19:59.4 |
HIP 15482 |
12.96 |
| 2026-05-30 00:00 |
03:21:43.85 |
+67:20:21.3 |
HIP 15765 |
13.19 |
| 2026-05-30 12:00 |
03:21:51.98 |
+67:20:43.4 |
HIP 15765 |
13.02 |
| 2026-05-31 00:00 |
03:22:00.10 |
+67:21:05.8 |
HIP 15765 |
12.90 |
| 2026-05-31 12:00 |
03:22:08.20 |
+67:21:28.5 |
HIP 15765 |
12.85 |
| 2026-06-01 00:00 |
03:22:16.28 |
+67:21:51.5 |
HIP 15852 |
12.51 |
| 2026-06-01 12:00 |
03:22:24.35 |
+67:22:14.7 |
HIP 15852 |
11.65 |
| 2026-06-02 00:00 |
03:22:32.39 |
+67:22:38.2 |
HIP 15852 |
10.78 |