| Parameter |
Value |
| Designation |
C/2010 J1 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-02-04T19:40:22.028160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:43Z |
| Obs used |
605 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
15.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-05-23.0000000 |
| e |
0.95382789 |
| q (au) |
1.695658 |
| a (au) |
36.724723 |
| i (deg) |
134.384945 |
| Ω (om, deg) |
254.813387 |
| ω (w, deg) |
333.109117 |
| M (ma, deg) |
0.474658 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.988 + 5.711\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.988 |
| n |
5.711 |
| gf |
0.973 |
| gb |
-0.502 |
| k |
1.000 |
| δ90 |
9.986 |
| 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) |
| 2026-09-20 00:00 |
08:16:56.45 |
+51:54:57.2 |
HIP 40508 |
26.38 |
| 2026-09-20 12:00 |
08:16:59.40 |
+51:55:15.1 |
HIP 40508 |
26.21 |
| 2026-09-21 00:00 |
08:17:02.31 |
+51:55:33.2 |
HIP 40508 |
26.04 |
| 2026-09-21 12:00 |
08:17:05.18 |
+51:55:51.5 |
HIP 40508 |
25.87 |
| 2026-09-22 00:00 |
08:17:08.01 |
+51:56:10.1 |
HIP 40508 |
25.71 |
| 2026-09-22 12:00 |
08:17:10.80 |
+51:56:28.9 |
HIP 40508 |
25.56 |
| 2026-09-23 00:00 |
08:17:13.55 |
+51:56:47.9 |
HIP 40508 |
25.41 |
| 2026-09-23 12:00 |
08:17:16.25 |
+51:57:07.1 |
HIP 40508 |
25.26 |
| 2026-09-24 00:00 |
08:17:18.92 |
+51:57:26.6 |
HIP 40508 |
25.12 |
| 2026-09-24 12:00 |
08:17:21.54 |
+51:57:46.2 |
HIP 40508 |
24.98 |
| 2026-09-25 00:00 |
08:17:24.12 |
+51:58:06.1 |
HIP 40508 |
24.85 |
| 2026-09-25 12:00 |
08:17:26.66 |
+51:58:26.1 |
HIP 40508 |
24.72 |
| 2026-09-26 00:00 |
08:17:29.16 |
+51:58:46.4 |
HIP 40508 |
24.59 |
| 2026-09-26 12:00 |
08:17:31.61 |
+51:59:06.9 |
HIP 40508 |
24.47 |
| 2026-09-27 00:00 |
08:17:34.02 |
+51:59:27.6 |
HIP 40508 |
24.35 |
| 2026-09-27 12:00 |
08:17:36.39 |
+51:59:48.5 |
HIP 40508 |
24.23 |
| 2026-09-28 00:00 |
08:17:38.72 |
+52:00:09.6 |
HIP 40508 |
24.12 |
| 2026-09-28 12:00 |
08:17:41.00 |
+52:00:30.9 |
HIP 40508 |
24.01 |
| 2026-09-29 00:00 |
08:17:43.24 |
+52:00:52.5 |
HIP 40508 |
23.91 |
| 2026-09-29 12:00 |
08:17:45.43 |
+52:01:14.2 |
HIP 40508 |
23.81 |
| 2026-09-30 00:00 |
08:17:47.58 |
+52:01:36.1 |
HIP 40508 |
23.71 |
| 2026-09-30 12:00 |
08:17:49.68 |
+52:01:58.2 |
HIP 40508 |
23.61 |
| 2026-10-01 00:00 |
08:17:51.74 |
+52:02:20.6 |
HIP 40508 |
23.52 |
| 2026-10-01 12:00 |
08:17:53.76 |
+52:02:43.1 |
HIP 40508 |
23.43 |
| 2026-10-02 00:00 |
08:17:55.73 |
+52:03:05.8 |
HIP 40508 |
23.34 |
| 2026-10-02 12:00 |
08:17:57.65 |
+52:03:28.7 |
HIP 40508 |
23.25 |
| 2026-10-03 00:00 |
08:17:59.53 |
+52:03:51.8 |
HIP 40508 |
23.17 |
| 2026-10-03 12:00 |
08:18:01.36 |
+52:04:15.1 |
HIP 40508 |
23.09 |
| 2026-10-04 00:00 |
08:18:03.15 |
+52:04:38.6 |
HIP 40508 |
23.01 |
| 2026-10-04 12:00 |
08:18:04.89 |
+52:05:02.3 |
HIP 40508 |
22.94 |
| 2026-10-05 00:00 |
08:18:06.58 |
+52:05:26.2 |
HIP 40508 |
22.86 |
| 2026-10-05 12:00 |
08:18:08.23 |
+52:05:50.3 |
HIP 40508 |
22.79 |
| 2026-10-06 00:00 |
08:18:09.82 |
+52:06:14.5 |
HIP 40508 |
22.72 |
| 2026-10-06 12:00 |
08:18:11.38 |
+52:06:39.0 |
HIP 40508 |
22.65 |
| 2026-10-07 00:00 |
08:18:12.88 |
+52:07:03.6 |
HIP 40508 |
22.59 |
| 2026-10-07 12:00 |
08:18:14.33 |
+52:07:28.4 |
HIP 40508 |
22.52 |
| 2026-10-08 00:00 |
08:18:15.74 |
+52:07:53.4 |
HIP 40508 |
22.46 |
| 2026-10-08 12:00 |
08:18:17.10 |
+52:08:18.5 |
HIP 40508 |
22.40 |
| 2026-10-09 00:00 |
08:18:18.41 |
+52:08:43.9 |
HIP 40508 |
22.34 |
| 2026-10-09 12:00 |
08:18:19.67 |
+52:09:09.4 |
HIP 40508 |
22.28 |
| 2026-10-10 00:00 |
08:18:20.88 |
+52:09:35.1 |
HIP 40508 |
22.23 |
| 2026-10-10 12:00 |
08:18:22.05 |
+52:10:00.9 |
HIP 40508 |
22.17 |
| 2026-10-11 00:00 |
08:18:23.16 |
+52:10:27.0 |
HIP 40508 |
22.12 |