메타데이터
| 항목 |
값 |
| 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 |
Osculating 궤도요소
| 항목 |
값 |
| 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 |
밝기
산란 + 전체 선형
$$
M_a = (14.305 + 3.229\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.305 |
| n |
3.229 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
18:19:41.68 |
-40:01:44.9 |
HIP 89881 |
16.97 |
| 2026-05-12 12:00 |
18:19:30.73 |
-40:02:09.9 |
HIP 89881 |
17.79 |
| 2026-05-13 00:00 |
18:19:19.63 |
-40:02:34.5 |
HIP 89881 |
18.84 |
| 2026-05-13 12:00 |
18:19:08.39 |
-40:02:58.6 |
HIP 89881 |
20.10 |
| 2026-05-14 00:00 |
18:18:57.00 |
-40:03:22.3 |
HIP 89881 |
21.53 |
| 2026-05-14 12:00 |
18:18:45.47 |
-40:03:45.5 |
HIP 89745 |
22.73 |
| 2026-05-15 00:00 |
18:18:33.79 |
-40:04:08.2 |
HIP 89745 |
22.61 |
| 2026-05-15 12:00 |
18:18:21.97 |
-40:04:30.4 |
HIP 89745 |
22.73 |
| 2026-05-16 00:00 |
18:18:10.02 |
-40:04:52.1 |
HIP 89745 |
23.09 |
| 2026-05-16 12:00 |
18:17:57.92 |
-40:05:13.3 |
HIP 89745 |
23.69 |
| 2026-05-17 00:00 |
18:17:45.68 |
-40:05:34.0 |
HIP 89745 |
24.52 |
| 2026-05-17 12:00 |
18:17:33.31 |
-40:05:54.1 |
HIP 89745 |
25.57 |
| 2026-05-18 00:00 |
18:17:20.81 |
-40:06:13.8 |
HIP 89552 |
24.68 |
| 2026-05-18 12:00 |
18:17:08.17 |
-40:06:32.9 |
HIP 89552 |
23.41 |
| 2026-05-19 00:00 |
18:16:55.41 |
-40:06:51.4 |
HIP 89552 |
22.34 |
| 2026-05-19 12:00 |
18:16:42.51 |
-40:07:09.4 |
HIP 89552 |
21.49 |
| 2026-05-20 00:00 |
18:16:29.49 |
-40:07:26.8 |
HIP 89552 |
20.92 |
| 2026-05-20 12:00 |
18:16:16.34 |
-40:07:43.6 |
HIP 89552 |
20.64 |
| 2026-05-21 00:00 |
18:16:03.06 |
-40:07:59.9 |
HIP 89552 |
20.69 |
| 2026-05-21 12:00 |
18:15:49.67 |
-40:08:15.6 |
HIP 89552 |
21.06 |
| 2026-05-22 00:00 |
18:15:36.15 |
-40:08:30.7 |
HIP 89552 |
21.75 |
| 2026-05-22 12:00 |
18:15:22.52 |
-40:08:45.2 |
HIP 89552 |
22.73 |
| 2026-05-23 00:00 |
18:15:08.77 |
-40:08:59.0 |
HIP 89552 |
23.98 |
| 2026-05-23 12:00 |
18:14:54.90 |
-40:09:12.3 |
HIP 89552 |
25.47 |
| 2026-05-24 00:00 |
18:14:40.92 |
-40:09:25.0 |
HIP 89552 |
27.15 |
| 2026-05-24 12:00 |
18:14:26.83 |
-40:09:37.0 |
HIP 89552 |
29.01 |
| 2026-05-25 00:00 |
18:14:12.63 |
-40:09:48.4 |
HIP 89315 |
28.42 |
| 2026-05-25 12:00 |
18:13:58.33 |
-40:09:59.2 |
HIP 89150 |
26.13 |
| 2026-05-26 00:00 |
18:13:43.91 |
-40:10:09.3 |
HIP 89150 |
23.38 |
| 2026-05-26 12:00 |
18:13:29.40 |
-40:10:18.8 |
HIP 89150 |
20.60 |
| 2026-05-27 00:00 |
18:13:14.78 |
-40:10:27.6 |
HIP 89150 |
17.81 |
| 2026-05-27 12:00 |
18:13:00.06 |
-40:10:35.7 |
HIP 89150 |
15.01 |
| 2026-05-28 00:00 |
18:12:45.24 |
-40:10:43.2 |
HIP 89150 |
12.19 |
| 2026-05-28 12:00 |
18:12:30.33 |
-40:10:50.1 |
HIP 89150 |
9.37 |
| 2026-05-29 00:00 |
18:12:15.32 |
-40:10:56.2 |
HIP 89150 |
6.55 |
| 2026-05-29 12:00 |
18:12:00.22 |
-40:11:01.7 |
HIP 89150 |
3.80 |
| 2026-05-30 00:00 |
18:11:45.02 |
-40:11:06.5 |
HIP 89150 |
1.63 |
| 2026-05-30 12:00 |
18:11:29.74 |
-40:11:10.5 |
HIP 89150 |
2.80 |
| 2026-05-31 00:00 |
18:11:14.37 |
-40:11:13.9 |
HIP 89150 |
5.50 |
| 2026-05-31 12:00 |
18:10:58.92 |
-40:11:16.6 |
HIP 89121 |
8.25 |
| 2026-06-01 00:00 |
18:10:43.38 |
-40:11:18.6 |
HIP 89121 |
10.04 |
| 2026-06-01 12:00 |
18:10:27.76 |
-40:11:19.9 |
HIP 89121 |
12.31 |
| 2026-06-02 00:00 |
18:10:12.06 |
-40:11:20.4 |
HIP 88933 |
11.43 |