메타데이터
| 항목 |
값 |
| Designation |
164P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-05-31T09:35:06.561600Z |
| Orbit solution date (soln_date, UTC) |
2026-07-20T21:57:30Z |
| Obs used |
1861 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-08-30.0000000 |
| e |
0.53972209 |
| q (au) |
1.685229 |
| a (au) |
3.661328 |
| i (deg) |
16.252976 |
| Ω (om, deg) |
88.305871 |
| ω (w, deg) |
325.925833 |
| M (ma, deg) |
12.746097 |
밝기
산란 + 전체 선형
$$
M_a = (13.705 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.705 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.699 |
| k |
0.989 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:30:11.93 |
+10:51:03.5 |
HIP 60943 |
20.33 |
| 2026-09-20 12:00 |
12:30:43.30 |
+10:47:33.9 |
HIP 60943 |
27.76 |
| 2026-09-21 00:00 |
12:31:14.66 |
+10:44:04.8 |
HIP 61090 |
24.41 |
| 2026-09-21 12:00 |
12:31:46.01 |
+10:40:36.3 |
HIP 61090 |
22.32 |
| 2026-09-22 00:00 |
12:32:17.34 |
+10:37:08.4 |
HIP 61246 |
22.40 |
| 2026-09-22 12:00 |
12:32:48.66 |
+10:33:41.0 |
HIP 61246 |
16.32 |
| 2026-09-23 00:00 |
12:33:19.97 |
+10:30:14.2 |
HIP 61246 |
13.18 |
| 2026-09-23 12:00 |
12:33:51.26 |
+10:26:48.0 |
HIP 61246 |
14.95 |
| 2026-09-24 00:00 |
12:34:22.53 |
+10:23:22.3 |
HIP 61246 |
20.38 |
| 2026-09-24 12:00 |
12:34:53.80 |
+10:19:57.2 |
HIP 61246 |
27.36 |
| 2026-09-25 00:00 |
12:35:25.04 |
+10:16:32.7 |
HIP 61413 |
27.44 |
| 2026-09-25 12:00 |
12:35:56.27 |
+10:13:08.7 |
HIP 61413 |
27.06 |
| 2026-09-26 00:00 |
12:36:27.49 |
+10:09:45.3 |
HIP 61413 |
29.22 |
| 2026-09-26 12:00 |
12:36:58.69 |
+10:06:22.6 |
HIP 61636 |
23.79 |
| 2026-09-27 00:00 |
12:37:29.87 |
+10:03:00.4 |
HIP 61636 |
16.48 |
| 2026-09-27 12:00 |
12:38:01.03 |
+09:59:38.7 |
HIP 61636 |
10.85 |
| 2026-09-28 00:00 |
12:38:32.18 |
+09:56:17.7 |
HIP 61636 |
10.22 |
| 2026-09-28 12:00 |
12:39:03.31 |
+09:52:57.3 |
HIP 61636 |
15.21 |
| 2026-09-29 00:00 |
12:39:34.42 |
+09:49:37.5 |
HIP 61636 |
22.32 |
| 2026-09-29 12:00 |
12:40:05.52 |
+09:46:18.3 |
HIP 61950 |
26.26 |
| 2026-09-30 00:00 |
12:40:36.59 |
+09:42:59.6 |
HIP 61950 |
20.41 |
| 2026-09-30 12:00 |
12:41:07.65 |
+09:39:41.6 |
HIP 61950 |
16.80 |
| 2026-10-01 00:00 |
12:41:38.69 |
+09:36:24.3 |
HIP 61950 |
16.93 |
| 2026-10-01 12:00 |
12:42:09.71 |
+09:33:07.5 |
HIP 61950 |
20.71 |
| 2026-10-02 00:00 |
12:42:40.71 |
+09:29:51.3 |
HIP 61950 |
26.63 |
| 2026-10-02 12:00 |
12:43:11.69 |
+09:26:35.8 |
HIP 61973 |
31.71 |
| 2026-10-03 00:00 |
12:43:42.64 |
+09:23:20.9 |
HIP 61973 |
34.22 |
| 2026-10-03 12:00 |
12:44:13.58 |
+09:20:06.7 |
HIP 62325 |
34.08 |
| 2026-10-04 00:00 |
12:44:44.50 |
+09:16:53.1 |
HIP 62325 |
28.72 |
| 2026-10-04 12:00 |
12:45:15.39 |
+09:13:40.1 |
HIP 62325 |
25.01 |
| 2026-10-05 00:00 |
12:45:46.26 |
+09:10:27.8 |
HIP 62375 |
19.88 |
| 2026-10-05 12:00 |
12:46:17.11 |
+09:07:16.1 |
HIP 62375 |
11.64 |
| 2026-10-06 00:00 |
12:46:47.94 |
+09:04:05.1 |
HIP 62375 |
3.53 |
| 2026-10-06 12:00 |
12:47:18.74 |
+09:00:54.8 |
HIP 62375 |
5.03 |
| 2026-10-07 00:00 |
12:47:49.52 |
+08:57:45.2 |
HIP 62489 |
11.60 |
| 2026-10-07 12:00 |
12:48:20.27 |
+08:54:36.2 |
HIP 62489 |
12.10 |
| 2026-10-08 00:00 |
12:48:51.00 |
+08:51:27.9 |
HIP 62489 |
17.11 |
| 2026-10-08 12:00 |
12:49:21.70 |
+08:48:20.3 |
HIP 62489 |
23.95 |
| 2026-10-09 00:00 |
12:49:52.37 |
+08:45:13.4 |
HIP 62519 |
31.14 |
| 2026-10-09 12:00 |
12:50:23.02 |
+08:42:07.1 |
HIP 62741 |
32.72 |
| 2026-10-10 00:00 |
12:50:53.64 |
+08:39:01.6 |
HIP 62741 |
27.21 |
| 2026-10-10 12:00 |
12:51:24.23 |
+08:35:56.8 |
HIP 62741 |
23.34 |
| 2026-10-11 00:00 |
12:51:54.79 |
+08:32:52.7 |
HIP 62741 |
21.98 |