메타데이터
| 항목 |
값 |
| Designation |
161P/Hartley-IRAS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-06-20T20:24:46.189440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:27:43Z |
| Obs used |
335 |
| NEO |
Yes |
| M1 |
11.500 |
| K1 |
11.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2004-07-04.0000000 |
| e |
0.83508810 |
| q (au) |
1.274829 |
| a (au) |
7.730366 |
| i (deg) |
95.698050 |
| Ω (om, deg) |
1.398165 |
| ω (w, deg) |
47.091452 |
| M (ma, deg) |
343.865252 |
밝기
산란 + 전체 선형
$$
M_a = (9.254 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.254 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
02:37:27.45 |
-29:06:50.5 |
HIP 12196 |
8.74 |
| 2026-05-12 12:00 |
02:37:50.34 |
-29:01:16.8 |
HIP 12196 |
10.03 |
| 2026-05-13 00:00 |
02:38:13.22 |
-28:55:44.6 |
HIP 12196 |
15.39 |
| 2026-05-13 12:00 |
02:38:36.10 |
-28:50:13.9 |
HIP 12196 |
22.00 |
| 2026-05-14 00:00 |
02:38:58.98 |
-28:44:44.8 |
HIP 12366 |
26.99 |
| 2026-05-14 12:00 |
02:39:21.85 |
-28:39:17.3 |
HIP 12366 |
21.53 |
| 2026-05-15 00:00 |
02:39:44.72 |
-28:33:51.4 |
HIP 12366 |
17.59 |
| 2026-05-15 12:00 |
02:40:07.57 |
-28:28:27.0 |
HIP 12366 |
16.29 |
| 2026-05-16 00:00 |
02:40:30.42 |
-28:23:04.2 |
HIP 12366 |
18.19 |
| 2026-05-16 12:00 |
02:40:53.26 |
-28:17:43.0 |
HIP 12593 |
20.54 |
| 2026-05-17 00:00 |
02:41:16.09 |
-28:12:23.4 |
HIP 12675 |
21.06 |
| 2026-05-17 12:00 |
02:41:38.91 |
-28:07:05.3 |
HIP 12675 |
15.90 |
| 2026-05-18 00:00 |
02:42:01.71 |
-28:01:48.8 |
HIP 12675 |
12.98 |
| 2026-05-18 12:00 |
02:42:24.50 |
-27:56:33.9 |
HIP 12675 |
13.76 |
| 2026-05-19 00:00 |
02:42:47.27 |
-27:51:20.6 |
HIP 12739 |
13.08 |
| 2026-05-19 12:00 |
02:43:10.03 |
-27:46:08.8 |
HIP 12739 |
11.03 |
| 2026-05-20 00:00 |
02:43:32.76 |
-27:40:58.7 |
HIP 12739 |
13.27 |
| 2026-05-20 12:00 |
02:43:55.48 |
-27:35:50.0 |
HIP 12739 |
18.27 |
| 2026-05-21 00:00 |
02:44:18.17 |
-27:30:43.0 |
HIP 12739 |
24.36 |
| 2026-05-21 12:00 |
02:44:40.85 |
-27:25:37.5 |
HIP 12739 |
30.89 |
| 2026-05-22 00:00 |
02:45:03.50 |
-27:20:33.6 |
HIP 12922 |
25.90 |
| 2026-05-22 12:00 |
02:45:26.12 |
-27:15:31.2 |
HIP 12922 |
18.89 |
| 2026-05-23 00:00 |
02:45:48.72 |
-27:10:30.4 |
HIP 12922 |
12.02 |
| 2026-05-23 12:00 |
02:46:11.29 |
-27:05:31.1 |
HIP 12922 |
5.79 |
| 2026-05-24 00:00 |
02:46:33.84 |
-27:00:33.4 |
HIP 12922 |
4.77 |
| 2026-05-24 12:00 |
02:46:56.36 |
-26:55:37.3 |
HIP 12922 |
10.55 |
| 2026-05-25 00:00 |
02:47:18.84 |
-26:50:42.7 |
HIP 12922 |
17.28 |
| 2026-05-25 12:00 |
02:47:41.30 |
-26:45:49.6 |
HIP 12922 |
24.16 |
| 2026-05-26 00:00 |
02:48:03.73 |
-26:40:58.0 |
HIP 12922 |
31.07 |
| 2026-05-26 12:00 |
02:48:26.12 |
-26:36:08.1 |
HIP 13067 |
31.15 |
| 2026-05-27 00:00 |
02:48:48.48 |
-26:31:19.6 |
HIP 13067 |
28.06 |
| 2026-05-27 12:00 |
02:49:10.81 |
-26:26:32.7 |
HIP 13067 |
26.48 |
| 2026-05-28 00:00 |
02:49:33.10 |
-26:21:47.3 |
HIP 13220 |
21.18 |
| 2026-05-28 12:00 |
02:49:55.35 |
-26:17:03.4 |
HIP 13220 |
15.06 |
| 2026-05-29 00:00 |
02:50:17.57 |
-26:12:21.1 |
HIP 13220 |
10.01 |
| 2026-05-29 12:00 |
02:50:39.75 |
-26:07:40.3 |
HIP 13220 |
8.23 |
| 2026-05-30 00:00 |
02:51:01.89 |
-26:03:01.0 |
HIP 13220 |
11.34 |
| 2026-05-30 12:00 |
02:51:23.99 |
-25:58:23.3 |
HIP 13220 |
16.79 |
| 2026-05-31 00:00 |
02:51:46.04 |
-25:53:47.0 |
HIP 13220 |
22.95 |
| 2026-05-31 12:00 |
02:52:08.06 |
-25:49:12.3 |
HIP 13489 |
28.98 |
| 2026-06-01 00:00 |
02:52:30.03 |
-25:44:39.2 |
HIP 13489 |
29.37 |
| 2026-06-01 12:00 |
02:52:51.96 |
-25:40:07.5 |
HIP 13489 |
31.21 |
| 2026-06-02 00:00 |
02:53:13.84 |
-25:35:37.4 |
HIP 13489 |
34.26 |