メタデータ
| 項目 |
値 |
| Designation |
451P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-01-17T03:54:57.801600Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:44:16Z |
| Obs used |
157 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
15.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2006-11-24T10:39:07.776000Z |
| Discovery magnitude (MPC) |
20.10 N |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-01-11.0000000 |
| e |
0.55743773 |
| q (au) |
2.795689 |
| a (au) |
6.317053 |
| i (deg) |
26.493684 |
| Ω (om, deg) |
301.041988 |
| ω (w, deg) |
186.900815 |
| M (ma, deg) |
67.654045 |
等級
散乱 + 全体線形
$$
M_a = (14.305 + 3.229\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.305 |
| n |
3.229 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| 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) |
| 2026-03-26 00:00 |
18:24:14.63 |
-39:06:38.1 |
HIP 90112 |
26.77 |
| 2026-03-26 12:00 |
18:24:19.91 |
-39:07:13.9 |
HIP 90112 |
26.65 |
| 2026-03-27 00:00 |
18:24:25.02 |
-39:07:49.9 |
HIP 90112 |
26.57 |
| 2026-03-27 12:00 |
18:24:29.95 |
-39:08:25.9 |
HIP 90112 |
26.52 |
| 2026-03-28 00:00 |
18:24:34.72 |
-39:09:02.2 |
HIP 90112 |
26.50 |
| 2026-03-28 12:00 |
18:24:39.31 |
-39:09:38.5 |
HIP 90112 |
26.50 |
| 2026-03-29 00:00 |
18:24:43.74 |
-39:10:14.9 |
HIP 90112 |
26.52 |
| 2026-03-29 12:00 |
18:24:47.98 |
-39:10:51.5 |
HIP 90112 |
26.56 |
| 2026-03-30 00:00 |
18:24:52.06 |
-39:11:28.2 |
HIP 90112 |
26.62 |
| 2026-03-30 12:00 |
18:24:55.96 |
-39:12:05.0 |
HIP 90435 |
25.82 |
| 2026-03-31 00:00 |
18:24:59.69 |
-39:12:41.9 |
HIP 90435 |
25.03 |
| 2026-03-31 12:00 |
18:25:03.25 |
-39:13:18.9 |
HIP 90435 |
24.28 |
| 2026-04-01 00:00 |
18:25:06.63 |
-39:13:56.0 |
HIP 90435 |
23.58 |
| 2026-04-01 12:00 |
18:25:09.84 |
-39:14:33.2 |
HIP 90435 |
22.92 |
| 2026-04-02 00:00 |
18:25:12.87 |
-39:15:10.5 |
HIP 90435 |
22.31 |
| 2026-04-02 12:00 |
18:25:15.73 |
-39:15:47.9 |
HIP 90435 |
21.76 |
| 2026-04-03 00:00 |
18:25:18.41 |
-39:16:25.4 |
HIP 90435 |
21.26 |
| 2026-04-03 12:00 |
18:25:20.92 |
-39:17:02.9 |
HIP 90435 |
20.81 |
| 2026-04-04 00:00 |
18:25:23.24 |
-39:17:40.5 |
HIP 90435 |
20.41 |
| 2026-04-04 12:00 |
18:25:25.40 |
-39:18:18.2 |
HIP 90435 |
20.07 |
| 2026-04-05 00:00 |
18:25:27.37 |
-39:18:56.0 |
HIP 90435 |
19.79 |
| 2026-04-05 12:00 |
18:25:29.17 |
-39:19:33.8 |
HIP 90435 |
19.57 |
| 2026-04-06 00:00 |
18:25:30.79 |
-39:20:11.7 |
HIP 90435 |
19.40 |
| 2026-04-06 12:00 |
18:25:32.23 |
-39:20:49.6 |
HIP 90435 |
19.30 |
| 2026-04-07 00:00 |
18:25:33.50 |
-39:21:27.6 |
HIP 90435 |
19.25 |
| 2026-04-07 12:00 |
18:25:34.58 |
-39:22:05.6 |
HIP 90435 |
19.25 |
| 2026-04-08 00:00 |
18:25:35.49 |
-39:22:43.7 |
HIP 90435 |
19.31 |
| 2026-04-08 12:00 |
18:25:36.22 |
-39:23:21.8 |
HIP 90435 |
19.43 |
| 2026-04-09 00:00 |
18:25:36.77 |
-39:23:59.9 |
HIP 90435 |
19.60 |
| 2026-04-09 12:00 |
18:25:37.14 |
-39:24:38.1 |
HIP 90435 |
19.82 |
| 2026-04-10 00:00 |
18:25:37.32 |
-39:25:16.2 |
HIP 90435 |
20.09 |
| 2026-04-10 12:00 |
18:25:37.33 |
-39:25:54.4 |
HIP 90435 |
20.40 |
| 2026-04-11 00:00 |
18:25:37.16 |
-39:26:32.6 |
HIP 90435 |
20.76 |
| 2026-04-11 12:00 |
18:25:36.81 |
-39:27:10.8 |
HIP 90435 |
21.16 |
| 2026-04-12 00:00 |
18:25:36.28 |
-39:27:49.0 |
HIP 90435 |
21.60 |
| 2026-04-12 12:00 |
18:25:35.56 |
-39:28:27.2 |
HIP 90435 |
22.08 |
| 2026-04-13 00:00 |
18:25:34.67 |
-39:29:05.4 |
HIP 90435 |
22.60 |
| 2026-04-13 12:00 |
18:25:33.59 |
-39:29:43.6 |
HIP 90435 |
23.15 |
| 2026-04-14 00:00 |
18:25:32.33 |
-39:30:21.7 |
HIP 90127 |
23.33 |
| 2026-04-14 12:00 |
18:25:30.89 |
-39:30:59.8 |
HIP 90127 |
22.96 |
| 2026-04-15 00:00 |
18:25:29.27 |
-39:31:37.9 |
HIP 90127 |
22.56 |
| 2026-04-15 12:00 |
18:25:27.47 |
-39:32:15.9 |
HIP 90127 |
22.15 |
| 2026-04-16 00:00 |
18:25:25.49 |
-39:32:53.9 |
HIP 90127 |
21.71 |