119P/Parker-Hartley
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) |
| 2026-02-03 00:00 |
16:40:54.21 |
-17:25:45.4 |
HIP 81647 |
7.41 |
| 2026-02-03 12:00 |
16:41:11.73 |
-17:26:07.7 |
HIP 81647 |
9.99 |
| 2026-02-04 00:00 |
16:41:29.13 |
-17:26:29.5 |
HIP 81647 |
13.39 |
| 2026-02-04 12:00 |
16:41:46.41 |
-17:26:50.8 |
HIP 81647 |
17.09 |
| 2026-02-05 00:00 |
16:42:03.56 |
-17:27:11.7 |
HIP 81724 |
18.68 |
| 2026-02-05 12:00 |
16:42:20.59 |
-17:27:32.1 |
HIP 81899 |
20.03 |
| 2026-02-06 00:00 |
16:42:37.48 |
-17:27:52.1 |
HIP 81899 |
16.00 |
| 2026-02-06 12:00 |
16:42:54.25 |
-17:28:11.6 |
HIP 81899 |
12.02 |
| 2026-02-07 00:00 |
16:43:10.89 |
-17:28:30.6 |
HIP 81899 |
8.11 |
| 2026-02-07 12:00 |
16:43:27.40 |
-17:28:49.1 |
HIP 81899 |
4.34 |
| 2026-02-08 00:00 |
16:43:43.77 |
-17:29:07.2 |
HIP 81899 |
1.78 |
| 2026-02-08 12:00 |
16:44:00.01 |
-17:29:24.8 |
HIP 81899 |
4.23 |
| 2026-02-09 00:00 |
16:44:16.12 |
-17:29:42.0 |
HIP 81899 |
7.90 |
| 2026-02-09 12:00 |
16:44:32.09 |
-17:29:58.7 |
HIP 81899 |
11.65 |
| 2026-02-10 00:00 |
16:44:47.92 |
-17:30:14.9 |
HIP 81899 |
15.40 |
| 2026-02-10 12:00 |
16:45:03.62 |
-17:30:30.7 |
HIP 81899 |
19.13 |
| 2026-02-11 00:00 |
16:45:19.18 |
-17:30:46.0 |
HIP 82102 |
16.60 |
| 2026-02-11 12:00 |
16:45:34.60 |
-17:31:00.9 |
HIP 82102 |
14.02 |
| 2026-02-12 00:00 |
16:45:49.88 |
-17:31:15.3 |
HIP 82120 |
11.46 |
| 2026-02-12 12:00 |
16:46:05.01 |
-17:31:29.3 |
HIP 82120 |
8.13 |
| 2026-02-13 00:00 |
16:46:20.00 |
-17:31:42.8 |
HIP 82120 |
5.23 |
| 2026-02-13 12:00 |
16:46:34.85 |
-17:31:55.9 |
HIP 82120 |
3.77 |
| 2026-02-14 00:00 |
16:46:49.56 |
-17:32:08.5 |
HIP 82120 |
5.11 |
| 2026-02-14 12:00 |
16:47:04.11 |
-17:32:20.7 |
HIP 82120 |
7.88 |
| 2026-02-15 00:00 |
16:47:18.53 |
-17:32:32.5 |
HIP 82120 |
11.03 |
| 2026-02-15 12:00 |
16:47:32.79 |
-17:32:43.8 |
HIP 82120 |
14.28 |
| 2026-02-16 00:00 |
16:47:46.90 |
-17:32:54.6 |
HIP 82120 |
17.55 |
| 2026-02-16 12:00 |
16:48:00.86 |
-17:33:05.0 |
HIP 82120 |
20.82 |
| 2026-02-17 00:00 |
16:48:14.67 |
-17:33:15.0 |
HIP 82120 |
24.07 |
| 2026-02-17 12:00 |
16:48:28.33 |
-17:33:24.6 |
HIP 82120 |
27.30 |
| 2026-02-18 00:00 |
16:48:41.83 |
-17:33:33.7 |
HIP 82120 |
30.50 |
| 2026-02-18 12:00 |
16:48:55.18 |
-17:33:42.4 |
HIP 82120 |
33.66 |
| 2026-02-19 00:00 |
16:49:08.38 |
-17:33:50.6 |
HIP 82120 |
36.79 |
| 2026-02-19 12:00 |
16:49:21.42 |
-17:33:58.5 |
HIP 82393 |
35.59 |
| 2026-02-20 00:00 |
16:49:34.30 |
-17:34:05.9 |
HIP 82393 |
34.63 |
| 2026-02-20 12:00 |
16:49:47.02 |
-17:34:12.9 |
HIP 82393 |
33.94 |
| 2026-02-21 00:00 |
16:49:59.58 |
-17:34:19.4 |
HIP 82393 |
33.51 |
| 2026-02-21 12:00 |
16:50:11.98 |
-17:34:25.6 |
HIP 82393 |
33.36 |
| 2026-02-22 00:00 |
16:50:24.22 |
-17:34:31.3 |
HIP 82393 |
33.47 |
| 2026-02-22 12:00 |
16:50:36.30 |
-17:34:36.6 |
HIP 82393 |
33.83 |
| 2026-02-23 00:00 |
16:50:48.22 |
-17:34:41.5 |
HIP 82393 |
34.42 |
| 2026-02-23 12:00 |
16:50:59.97 |
-17:34:46.1 |
HIP 82393 |
35.22 |
| 2026-02-24 00:00 |
16:51:11.56 |
-17:34:50.2 |
HIP 82393 |
36.22 |