メタデータ
| 項目 |
値 |
| Designation |
P/2010 J3 (McMillan) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-08-23T11:07:54.177600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
524 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
11.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-06-09.0000000 |
| e |
0.72682274 |
| q (au) |
2.455111 |
| a (au) |
8.987243 |
| i (deg) |
13.255078 |
| Ω (om, deg) |
106.661189 |
| ω (w, deg) |
157.312459 |
| M (ma, deg) |
357.239402 |
等級
散乱 + 全体線形
$$
M_a = (12.620 + 4.528\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.620 |
| n |
4.528 |
| gf |
1.000 |
| gb |
-0.528 |
| k |
0.800 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
06:27:23.38 |
+20:05:25.1 |
HIP 30647 |
13.89 |
| 2026-09-20 12:00 |
06:27:25.72 |
+20:05:20.7 |
HIP 30647 |
14.43 |
| 2026-09-21 00:00 |
06:27:28.00 |
+20:05:16.4 |
HIP 30647 |
14.95 |
| 2026-09-21 12:00 |
06:27:30.22 |
+20:05:12.1 |
HIP 30647 |
15.45 |
| 2026-09-22 00:00 |
06:27:32.36 |
+20:05:07.8 |
HIP 30647 |
15.95 |
| 2026-09-22 12:00 |
06:27:34.44 |
+20:05:03.6 |
HIP 30647 |
16.42 |
| 2026-09-23 00:00 |
06:27:36.45 |
+20:04:59.4 |
HIP 30647 |
16.89 |
| 2026-09-23 12:00 |
06:27:38.39 |
+20:04:55.2 |
HIP 30647 |
17.33 |
| 2026-09-24 00:00 |
06:27:40.27 |
+20:04:51.1 |
HIP 30647 |
17.77 |
| 2026-09-24 12:00 |
06:27:42.07 |
+20:04:47.0 |
HIP 30647 |
18.18 |
| 2026-09-25 00:00 |
06:27:43.81 |
+20:04:43.0 |
HIP 30647 |
18.58 |
| 2026-09-25 12:00 |
06:27:45.48 |
+20:04:39.0 |
HIP 30883 |
18.80 |
| 2026-09-26 00:00 |
06:27:47.08 |
+20:04:35.0 |
HIP 30883 |
18.49 |
| 2026-09-26 12:00 |
06:27:48.61 |
+20:04:31.1 |
HIP 30883 |
18.20 |
| 2026-09-27 00:00 |
06:27:50.08 |
+20:04:27.2 |
HIP 30883 |
17.92 |
| 2026-09-27 12:00 |
06:27:51.47 |
+20:04:23.3 |
HIP 30883 |
17.66 |
| 2026-09-28 00:00 |
06:27:52.80 |
+20:04:19.5 |
HIP 30883 |
17.42 |
| 2026-09-28 12:00 |
06:27:54.05 |
+20:04:15.7 |
HIP 30883 |
17.19 |
| 2026-09-29 00:00 |
06:27:55.24 |
+20:04:12.0 |
HIP 30883 |
16.98 |
| 2026-09-29 12:00 |
06:27:56.35 |
+20:04:08.3 |
HIP 30883 |
16.79 |
| 2026-09-30 00:00 |
06:27:57.40 |
+20:04:04.6 |
HIP 30883 |
16.61 |
| 2026-09-30 12:00 |
06:27:58.37 |
+20:04:01.0 |
HIP 30883 |
16.44 |
| 2026-10-01 00:00 |
06:27:59.28 |
+20:03:57.5 |
HIP 30883 |
16.30 |
| 2026-10-01 12:00 |
06:28:00.11 |
+20:03:53.9 |
HIP 30883 |
16.16 |
| 2026-10-02 00:00 |
06:28:00.88 |
+20:03:50.5 |
HIP 30883 |
16.05 |
| 2026-10-02 12:00 |
06:28:01.57 |
+20:03:47.0 |
HIP 30883 |
15.94 |
| 2026-10-03 00:00 |
06:28:02.19 |
+20:03:43.6 |
HIP 30883 |
15.85 |
| 2026-10-03 12:00 |
06:28:02.74 |
+20:03:40.3 |
HIP 30883 |
15.78 |
| 2026-10-04 00:00 |
06:28:03.22 |
+20:03:37.0 |
HIP 30883 |
15.72 |
| 2026-10-04 12:00 |
06:28:03.63 |
+20:03:33.8 |
HIP 30883 |
15.67 |
| 2026-10-05 00:00 |
06:28:03.96 |
+20:03:30.6 |
HIP 30883 |
15.64 |
| 2026-10-05 12:00 |
06:28:04.23 |
+20:03:27.5 |
HIP 30883 |
15.62 |
| 2026-10-06 00:00 |
06:28:04.42 |
+20:03:24.4 |
HIP 30883 |
15.62 |
| 2026-10-06 12:00 |
06:28:04.54 |
+20:03:21.3 |
HIP 30883 |
15.62 |
| 2026-10-07 00:00 |
06:28:04.59 |
+20:03:18.4 |
HIP 30883 |
15.64 |
| 2026-10-07 12:00 |
06:28:04.56 |
+20:03:15.4 |
HIP 30883 |
15.68 |
| 2026-10-08 00:00 |
06:28:04.47 |
+20:03:12.5 |
HIP 30883 |
15.73 |
| 2026-10-08 12:00 |
06:28:04.30 |
+20:03:09.7 |
HIP 30883 |
15.79 |
| 2026-10-09 00:00 |
06:28:04.05 |
+20:03:07.0 |
HIP 30883 |
15.86 |
| 2026-10-09 12:00 |
06:28:03.74 |
+20:03:04.2 |
HIP 30883 |
15.95 |
| 2026-10-10 00:00 |
06:28:03.35 |
+20:03:01.6 |
HIP 30883 |
16.05 |
| 2026-10-10 12:00 |
06:28:02.89 |
+20:02:59.0 |
HIP 30883 |
16.16 |
| 2026-10-11 00:00 |
06:28:02.36 |
+20:02:56.4 |
HIP 30883 |
16.28 |