메타데이터
| 항목 |
값 |
| Designation |
52P/Harrington-Abell |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-03-07T08:33:30.715200Z |
| Orbit solution date (soln_date, UTC) |
2023-12-07T09:27:11Z |
| Obs used |
1164 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
16.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-07-09.0000000 |
| e |
0.54004886 |
| q (au) |
1.775054 |
| a (au) |
3.859222 |
| i (deg) |
10.231762 |
| Ω (om, deg) |
336.835681 |
| ω (w, deg) |
139.660705 |
| M (ma, deg) |
111.106469 |
밝기
산란 + 전체 선형
$$
M_a = (11.377 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.377 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.989 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2020-09-13 |
2022-02-27 |
+11.7519 |
-3.355 |
| 2022-02-27 |
2022-05-26 |
-2.1491 |
+1.106 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
21:21:04.41 |
-20:30:52.4 |
HIP 105410 |
18.39 |
| 2026-07-29 12:00 |
21:20:46.59 |
-20:31:59.8 |
HIP 105410 |
17.70 |
| 2026-07-30 00:00 |
21:20:28.70 |
-20:33:07.0 |
HIP 105410 |
18.04 |
| 2026-07-30 12:00 |
21:20:10.76 |
-20:34:14.1 |
HIP 105410 |
19.39 |
| 2026-07-31 00:00 |
21:19:52.75 |
-20:35:21.0 |
HIP 105410 |
21.55 |
| 2026-07-31 12:00 |
21:19:34.68 |
-20:36:27.8 |
HIP 105181 |
22.90 |
| 2026-08-01 00:00 |
21:19:16.56 |
-20:37:34.4 |
HIP 105181 |
21.07 |
| 2026-08-01 12:00 |
21:18:58.39 |
-20:38:40.8 |
HIP 105181 |
20.03 |
| 2026-08-02 00:00 |
21:18:40.17 |
-20:39:47.0 |
HIP 105181 |
19.93 |
| 2026-08-02 12:00 |
21:18:21.90 |
-20:40:53.0 |
HIP 105181 |
20.78 |
| 2026-08-03 00:00 |
21:18:03.58 |
-20:41:58.8 |
HIP 105181 |
22.49 |
| 2026-08-03 12:00 |
21:17:45.22 |
-20:43:04.4 |
HIP 105181 |
24.87 |
| 2026-08-04 00:00 |
21:17:26.82 |
-20:44:09.7 |
HIP 104963 |
25.97 |
| 2026-08-04 12:00 |
21:17:08.39 |
-20:45:14.7 |
HIP 104963 |
22.04 |
| 2026-08-05 00:00 |
21:16:49.91 |
-20:46:19.5 |
HIP 104963 |
18.33 |
| 2026-08-05 12:00 |
21:16:31.41 |
-20:47:24.0 |
HIP 104963 |
15.02 |
| 2026-08-06 00:00 |
21:16:12.88 |
-20:48:28.2 |
HIP 104963 |
12.44 |
| 2026-08-06 12:00 |
21:15:54.31 |
-20:49:32.1 |
HIP 104963 |
11.12 |
| 2026-08-07 00:00 |
21:15:35.73 |
-20:50:35.7 |
HIP 104903 |
9.44 |
| 2026-08-07 12:00 |
21:15:17.12 |
-20:51:38.9 |
HIP 104903 |
6.24 |
| 2026-08-08 00:00 |
21:14:58.49 |
-20:52:41.8 |
HIP 104903 |
5.36 |
| 2026-08-08 12:00 |
21:14:39.85 |
-20:53:44.4 |
HIP 104903 |
7.65 |
| 2026-08-09 00:00 |
21:14:21.19 |
-20:54:46.5 |
HIP 104903 |
11.33 |
| 2026-08-09 12:00 |
21:14:02.53 |
-20:55:48.3 |
HIP 104903 |
15.44 |
| 2026-08-10 00:00 |
21:13:43.85 |
-20:56:49.8 |
HIP 104708 |
16.14 |
| 2026-08-10 12:00 |
21:13:25.17 |
-20:57:50.8 |
HIP 104708 |
11.66 |
| 2026-08-11 00:00 |
21:13:06.49 |
-20:58:51.4 |
HIP 104708 |
7.19 |
| 2026-08-11 12:00 |
21:12:47.81 |
-20:59:51.5 |
HIP 104708 |
2.72 |
| 2026-08-12 00:00 |
21:12:29.14 |
-21:00:51.3 |
HIP 104708 |
1.78 |
| 2026-08-12 12:00 |
21:12:10.47 |
-21:01:50.6 |
HIP 104708 |
6.23 |
| 2026-08-13 00:00 |
21:11:51.81 |
-21:02:49.4 |
HIP 104708 |
10.70 |
| 2026-08-13 12:00 |
21:11:33.16 |
-21:03:47.7 |
HIP 104708 |
15.15 |
| 2026-08-14 00:00 |
21:11:14.53 |
-21:04:45.6 |
HIP 104708 |
19.60 |
| 2026-08-14 12:00 |
21:10:55.92 |
-21:05:43.0 |
HIP 104455 |
19.19 |
| 2026-08-15 00:00 |
21:10:37.33 |
-21:06:39.8 |
HIP 104455 |
15.14 |
| 2026-08-15 12:00 |
21:10:18.77 |
-21:07:36.2 |
HIP 104455 |
11.38 |
| 2026-08-16 00:00 |
21:10:00.23 |
-21:08:32.0 |
HIP 104455 |
8.30 |
| 2026-08-16 12:00 |
21:09:41.73 |
-21:09:27.3 |
HIP 104455 |
6.90 |
| 2026-08-17 00:00 |
21:09:23.25 |
-21:10:22.0 |
HIP 104455 |
8.06 |
| 2026-08-17 12:00 |
21:09:04.82 |
-21:11:16.2 |
HIP 104365 |
7.28 |
| 2026-08-18 00:00 |
21:08:46.42 |
-21:12:09.8 |
HIP 104365 |
3.04 |
| 2026-08-18 12:00 |
21:08:28.07 |
-21:13:02.8 |
HIP 104365 |
1.93 |
| 2026-08-19 00:00 |
21:08:09.75 |
-21:13:55.3 |
HIP 104365 |
6.02 |