메타데이터
| 항목 |
값 |
| Designation |
168P/Hergenrother |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-10-01T22:24:03.841920Z |
| Orbit solution date (soln_date, UTC) |
2025-11-21T13:43:00Z |
| Obs used |
3377 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
44.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-10-05.0000000 |
| e |
0.60947452 |
| q (au) |
1.415279 |
| a (au) |
3.624038 |
| i (deg) |
21.929366 |
| Ω (om, deg) |
356.477671 |
| ω (w, deg) |
13.919130 |
| M (ma, deg) |
308.150819 |
밝기
산란 + 전체 선형
$$
M_a = (14.192 + 5.667\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.192 |
| n |
5.667 |
| gf |
0.916 |
| gb |
-0.533 |
| k |
0.990 |
| δ90 |
3.742 |
| 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) |
| 2026-05-12 00:00 |
01:26:14.72 |
+11:29:52.1 |
HIP 6730 |
9.48 |
| 2026-05-12 12:00 |
01:27:42.58 |
+11:44:14.6 |
HIP 6764 |
24.37 |
| 2026-05-13 00:00 |
01:29:10.57 |
+11:58:35.8 |
HIP 6941 |
25.00 |
| 2026-05-13 12:00 |
01:30:38.68 |
+12:12:55.7 |
HIP 6941 |
20.78 |
| 2026-05-14 00:00 |
01:32:06.93 |
+12:27:14.2 |
HIP 7011 |
29.38 |
| 2026-05-14 12:00 |
01:33:35.31 |
+12:41:31.2 |
HIP 7364 |
20.26 |
| 2026-05-15 00:00 |
01:35:03.81 |
+12:55:46.7 |
HIP 7367 |
22.37 |
| 2026-05-15 12:00 |
01:36:32.46 |
+13:10:00.7 |
HIP 7621 |
30.58 |
| 2026-05-16 00:00 |
01:38:01.23 |
+13:24:13.1 |
HIP 7653 |
16.57 |
| 2026-05-16 12:00 |
01:39:30.14 |
+13:38:23.8 |
HIP 7653 |
13.76 |
| 2026-05-17 00:00 |
01:40:59.18 |
+13:52:32.8 |
HIP 7859 |
6.26 |
| 2026-05-17 12:00 |
01:42:28.36 |
+14:06:40.1 |
HIP 8126 |
28.50 |
| 2026-05-18 00:00 |
01:43:57.67 |
+14:20:45.5 |
HIP 8126 |
18.59 |
| 2026-05-18 12:00 |
01:45:27.12 |
+14:34:49.1 |
HIP 8071 |
26.32 |
| 2026-05-19 00:00 |
01:46:56.71 |
+14:48:50.8 |
HIP 8071 |
47.41 |
| 2026-05-19 12:00 |
01:48:26.44 |
+15:02:50.6 |
HIP 8568 |
31.25 |
| 2026-05-20 00:00 |
01:49:56.30 |
+15:16:48.3 |
HIP 8568 |
9.42 |
| 2026-05-20 12:00 |
01:51:26.31 |
+15:30:44.0 |
HIP 8782 |
22.54 |
| 2026-05-21 00:00 |
01:52:56.45 |
+15:44:37.6 |
HIP 8782 |
8.80 |
| 2026-05-21 12:00 |
01:54:26.74 |
+15:58:29.0 |
HIP 8782 |
31.22 |
| 2026-05-22 00:00 |
01:55:57.17 |
+16:12:18.3 |
HIP 9076 |
16.52 |
| 2026-05-22 12:00 |
01:57:27.75 |
+16:26:05.2 |
HIP 9228 |
17.50 |
| 2026-05-23 00:00 |
01:58:58.46 |
+16:39:49.9 |
HIP 9228 |
9.27 |
| 2026-05-23 12:00 |
02:00:29.33 |
+16:53:32.3 |
HIP 9434 |
21.88 |
| 2026-05-24 00:00 |
02:02:00.33 |
+17:07:12.2 |
HIP 9613 |
22.83 |
| 2026-05-24 12:00 |
02:03:31.49 |
+17:20:49.7 |
HIP 9613 |
8.66 |
| 2026-05-25 00:00 |
02:05:02.79 |
+17:34:24.8 |
HIP 9777 |
10.75 |
| 2026-05-25 12:00 |
02:06:34.24 |
+17:47:57.3 |
HIP 9777 |
15.03 |
| 2026-05-26 00:00 |
02:08:05.84 |
+18:01:27.2 |
HIP 9924 |
4.73 |
| 2026-05-26 12:00 |
02:09:37.59 |
+18:14:54.5 |
HIP 9924 |
29.59 |
| 2026-05-27 00:00 |
02:11:09.48 |
+18:28:19.1 |
HIP 10295 |
33.82 |
| 2026-05-27 12:00 |
02:12:41.53 |
+18:41:41.0 |
HIP 10451 |
35.68 |
| 2026-05-28 00:00 |
02:14:13.73 |
+18:55:00.1 |
HIP 10451 |
10.68 |
| 2026-05-28 12:00 |
02:15:46.09 |
+19:08:16.4 |
HIP 10451 |
16.15 |
| 2026-05-29 00:00 |
02:17:18.59 |
+19:21:29.9 |
HIP 10710 |
21.21 |
| 2026-05-29 12:00 |
02:18:51.25 |
+19:34:40.4 |
HIP 10810 |
7.78 |
| 2026-05-30 00:00 |
02:20:24.06 |
+19:47:48.1 |
HIP 10810 |
18.89 |
| 2026-05-30 12:00 |
02:21:57.03 |
+20:00:52.7 |
HIP 11032 |
28.42 |
| 2026-05-31 00:00 |
02:23:30.15 |
+20:13:54.3 |
HIP 11032 |
25.18 |
| 2026-05-31 12:00 |
02:25:03.43 |
+20:26:52.8 |
HIP 11329 |
14.34 |
| 2026-06-01 00:00 |
02:26:36.86 |
+20:39:48.2 |
HIP 11329 |
25.78 |
| 2026-06-01 12:00 |
02:28:10.45 |
+20:52:40.4 |
HIP 11559 |
21.39 |
| 2026-06-02 00:00 |
02:29:44.20 |
+21:05:29.4 |
HIP 11559 |
12.91 |