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 · University of Arizona 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) |
| 2026-07-29 00:00 |
17:41:00.87 |
-38:52:53.5 |
HIP 86670 |
19.36 |
| 2026-07-29 12:00 |
17:40:50.36 |
-38:51:39.1 |
HIP 86670 |
21.75 |
| 2026-07-30 00:00 |
17:40:39.98 |
-38:50:24.3 |
HIP 86474 |
22.67 |
| 2026-07-30 12:00 |
17:40:29.75 |
-38:49:09.3 |
HIP 86474 |
23.47 |
| 2026-07-31 00:00 |
17:40:19.67 |
-38:47:54.0 |
HIP 86474 |
24.47 |
| 2026-07-31 12:00 |
17:40:09.73 |
-38:46:38.4 |
HIP 86429 |
23.90 |
| 2026-08-01 00:00 |
17:39:59.94 |
-38:45:22.5 |
HIP 86429 |
22.19 |
| 2026-08-01 12:00 |
17:39:50.30 |
-38:44:06.4 |
HIP 86429 |
20.59 |
| 2026-08-02 00:00 |
17:39:40.81 |
-38:42:50.0 |
HIP 86429 |
19.13 |
| 2026-08-02 12:00 |
17:39:31.46 |
-38:41:33.3 |
HIP 86429 |
17.82 |
| 2026-08-03 00:00 |
17:39:22.27 |
-38:40:16.4 |
HIP 86429 |
16.71 |
| 2026-08-03 12:00 |
17:39:13.23 |
-38:38:59.3 |
HIP 86429 |
15.81 |
| 2026-08-04 00:00 |
17:39:04.34 |
-38:37:42.0 |
HIP 86429 |
15.16 |
| 2026-08-04 12:00 |
17:38:55.60 |
-38:36:24.4 |
HIP 86429 |
14.79 |
| 2026-08-05 00:00 |
17:38:47.01 |
-38:35:06.6 |
HIP 86429 |
14.69 |
| 2026-08-05 12:00 |
17:38:38.58 |
-38:33:48.7 |
HIP 86429 |
14.89 |
| 2026-08-06 00:00 |
17:38:30.30 |
-38:32:30.5 |
HIP 86429 |
15.34 |
| 2026-08-06 12:00 |
17:38:22.18 |
-38:31:12.1 |
HIP 86429 |
16.02 |
| 2026-08-07 00:00 |
17:38:14.21 |
-38:29:53.6 |
HIP 86429 |
16.90 |
| 2026-08-07 12:00 |
17:38:06.40 |
-38:28:34.9 |
HIP 86429 |
17.94 |
| 2026-08-08 00:00 |
17:37:58.75 |
-38:27:16.0 |
HIP 86429 |
19.10 |
| 2026-08-08 12:00 |
17:37:51.25 |
-38:25:57.0 |
HIP 86170 |
19.56 |
| 2026-08-09 00:00 |
17:37:43.91 |
-38:24:37.8 |
HIP 86170 |
19.35 |
| 2026-08-09 12:00 |
17:37:36.74 |
-38:23:18.5 |
HIP 86170 |
19.36 |
| 2026-08-10 00:00 |
17:37:29.72 |
-38:21:59.0 |
HIP 86246 |
18.01 |
| 2026-08-10 12:00 |
17:37:22.86 |
-38:20:39.4 |
HIP 86246 |
16.70 |
| 2026-08-11 00:00 |
17:37:16.16 |
-38:19:19.7 |
HIP 86246 |
15.49 |
| 2026-08-11 12:00 |
17:37:09.63 |
-38:18:00.0 |
HIP 86246 |
14.42 |
| 2026-08-12 00:00 |
17:37:03.25 |
-38:16:40.0 |
HIP 86246 |
13.51 |
| 2026-08-12 12:00 |
17:36:57.04 |
-38:15:20.0 |
HIP 86246 |
12.78 |
| 2026-08-13 00:00 |
17:36:50.99 |
-38:14:00.0 |
HIP 86246 |
12.26 |
| 2026-08-13 12:00 |
17:36:45.10 |
-38:12:39.7 |
HIP 86119 |
10.91 |
| 2026-08-14 00:00 |
17:36:39.38 |
-38:11:19.5 |
HIP 86119 |
9.22 |
| 2026-08-14 12:00 |
17:36:33.82 |
-38:09:59.2 |
HIP 86119 |
7.58 |
| 2026-08-15 00:00 |
17:36:28.42 |
-38:08:38.8 |
HIP 86119 |
6.02 |
| 2026-08-15 12:00 |
17:36:23.19 |
-38:07:18.4 |
HIP 86119 |
4.59 |
| 2026-08-16 00:00 |
17:36:18.12 |
-38:05:57.9 |
HIP 86119 |
3.44 |
| 2026-08-16 12:00 |
17:36:13.22 |
-38:04:37.4 |
HIP 86119 |
2.89 |
| 2026-08-17 00:00 |
17:36:08.48 |
-38:03:16.8 |
HIP 86119 |
3.24 |
| 2026-08-17 12:00 |
17:36:03.90 |
-38:01:56.3 |
HIP 86119 |
4.24 |
| 2026-08-18 00:00 |
17:35:59.50 |
-38:00:35.7 |
HIP 86119 |
5.54 |
| 2026-08-18 12:00 |
17:35:55.25 |
-37:59:15.1 |
HIP 86119 |
6.96 |
| 2026-08-19 00:00 |
17:35:51.17 |
-37:57:54.5 |
HIP 86079 |
8.16 |