메타데이터
| 항목 |
값 |
| Designation |
119P/Parker-Hartley |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-03T23:02:16.448640Z |
| Orbit solution date (soln_date, UTC) |
2024-09-01T19:42:26Z |
| Obs used |
3237 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
13.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-08-20.0000000 |
| e |
0.29594027 |
| q (au) |
3.023931 |
| a (au) |
4.294992 |
| i (deg) |
5.183509 |
| Ω (om, deg) |
243.678154 |
| ω (w, deg) |
181.859700 |
| M (ma, deg) |
55.701021 |
밝기
산란 + 전체 선형
$$
M_a = (8.651 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.651 |
| n |
6.000 |
| gf |
0.801 |
| gb |
-0.500 |
| k |
0.964 |
| δ90 |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-05-28 |
2021-10-23 |
+0.9742 |
-0.715 |
| 2021-10-23 |
2024-05-06 |
-1.5544 |
+0.897 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
16:17:47.67 |
-17:56:45.9 |
HIP 79895 |
34.80 |
| 2026-09-20 12:00 |
16:18:02.94 |
-17:57:53.0 |
HIP 79895 |
35.10 |
| 2026-09-21 00:00 |
16:18:18.35 |
-17:59:00.2 |
HIP 79895 |
35.81 |
| 2026-09-21 12:00 |
16:18:33.90 |
-18:00:07.6 |
HIP 79895 |
36.91 |
| 2026-09-22 00:00 |
16:18:49.58 |
-18:01:15.0 |
HIP 80083 |
34.63 |
| 2026-09-22 12:00 |
16:19:05.40 |
-18:02:22.6 |
HIP 80083 |
32.65 |
| 2026-09-23 00:00 |
16:19:21.36 |
-18:03:30.3 |
HIP 80083 |
31.02 |
| 2026-09-23 12:00 |
16:19:37.45 |
-18:04:38.1 |
HIP 80083 |
29.81 |
| 2026-09-24 00:00 |
16:19:53.67 |
-18:05:45.9 |
HIP 80083 |
29.10 |
| 2026-09-24 12:00 |
16:20:10.03 |
-18:06:53.9 |
HIP 80083 |
28.93 |
| 2026-09-25 00:00 |
16:20:26.52 |
-18:08:02.0 |
HIP 80083 |
29.32 |
| 2026-09-25 12:00 |
16:20:43.14 |
-18:09:10.1 |
HIP 80165 |
29.82 |
| 2026-09-26 00:00 |
16:20:59.89 |
-18:10:18.4 |
HIP 80165 |
26.82 |
| 2026-09-26 12:00 |
16:21:16.77 |
-18:11:26.7 |
HIP 80165 |
24.14 |
| 2026-09-27 00:00 |
16:21:33.78 |
-18:12:35.0 |
HIP 80165 |
21.93 |
| 2026-09-27 12:00 |
16:21:50.91 |
-18:13:43.5 |
HIP 80165 |
20.34 |
| 2026-09-28 00:00 |
16:22:08.18 |
-18:14:52.0 |
HIP 80165 |
19.56 |
| 2026-09-28 12:00 |
16:22:25.57 |
-18:16:00.6 |
HIP 80165 |
19.70 |
| 2026-09-29 00:00 |
16:22:43.09 |
-18:17:09.2 |
HIP 80165 |
20.76 |
| 2026-09-29 12:00 |
16:23:00.73 |
-18:18:17.9 |
HIP 80165 |
22.62 |
| 2026-09-30 00:00 |
16:23:18.49 |
-18:19:26.6 |
HIP 80165 |
25.12 |
| 2026-09-30 12:00 |
16:23:36.38 |
-18:20:35.4 |
HIP 80269 |
25.71 |
| 2026-10-01 00:00 |
16:23:54.40 |
-18:21:44.2 |
HIP 80269 |
26.10 |
| 2026-10-01 12:00 |
16:24:12.53 |
-18:22:53.1 |
HIP 80269 |
27.23 |
| 2026-10-02 00:00 |
16:24:30.79 |
-18:24:02.0 |
HIP 80269 |
29.02 |
| 2026-10-02 12:00 |
16:24:49.17 |
-18:25:10.9 |
HIP 80269 |
31.37 |
| 2026-10-03 00:00 |
16:25:07.67 |
-18:26:19.8 |
HIP 80569 |
27.00 |
| 2026-10-03 12:00 |
16:25:26.29 |
-18:27:28.8 |
HIP 80569 |
22.56 |
| 2026-10-04 00:00 |
16:25:45.03 |
-18:28:37.7 |
HIP 80569 |
18.16 |
| 2026-10-04 12:00 |
16:26:03.89 |
-18:29:46.7 |
HIP 80569 |
13.86 |
| 2026-10-05 00:00 |
16:26:22.86 |
-18:30:55.7 |
HIP 80569 |
9.81 |
| 2026-10-05 12:00 |
16:26:41.96 |
-18:32:04.7 |
HIP 80569 |
6.59 |
| 2026-10-06 00:00 |
16:27:01.17 |
-18:33:13.7 |
HIP 80569 |
5.86 |
| 2026-10-06 12:00 |
16:27:20.49 |
-18:34:22.7 |
HIP 80569 |
8.34 |
| 2026-10-07 00:00 |
16:27:39.93 |
-18:35:31.7 |
HIP 80569 |
12.24 |
| 2026-10-07 12:00 |
16:27:59.49 |
-18:36:40.6 |
HIP 80569 |
16.61 |
| 2026-10-08 00:00 |
16:28:19.16 |
-18:37:49.5 |
HIP 80784 |
20.13 |
| 2026-10-08 12:00 |
16:28:38.94 |
-18:38:58.5 |
HIP 80784 |
15.33 |
| 2026-10-09 00:00 |
16:28:58.83 |
-18:40:07.3 |
HIP 80784 |
10.53 |
| 2026-10-09 12:00 |
16:29:18.83 |
-18:41:16.2 |
HIP 80784 |
5.79 |
| 2026-10-10 00:00 |
16:29:38.95 |
-18:42:25.0 |
HIP 80784 |
1.89 |
| 2026-10-10 12:00 |
16:29:59.17 |
-18:43:33.8 |
HIP 80784 |
4.68 |
| 2026-10-11 00:00 |
16:30:19.50 |
-18:44:42.5 |
HIP 80784 |
9.44 |