메타데이터
| 항목 |
값 |
| Designation |
6P/d’Arrest |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-09-17T18:56:35.044800Z |
| Orbit solution date (soln_date, UTC) |
2022-11-23T09:15:27Z |
| Obs used |
1093 |
| NEO |
- |
| M1 |
15.900 |
| K1 |
8.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-03-29.0000000 |
| e |
0.61267012 |
| q (au) |
1.354585 |
| a (au) |
3.497239 |
| i (deg) |
19.512431 |
| Ω (om, deg) |
138.937100 |
| ω (w, deg) |
178.106460 |
| M (ma, deg) |
333.960485 |
밝기
산란 + 전체 선형
$$
M_a = (14.690 + 3.915\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.690 |
| n |
3.915 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 2021-03-10 |
2021-07-17 |
-7.6930 |
+2.374 |
| 2021-07-17 |
2021-09-17 |
+39.7603 |
-6.394 |
| 2021-09-18 |
2022-04-02 |
-14.7809 |
-1.960 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
10:21:21.60 |
+18:44:17.6 |
HIP 50848 |
32.99 |
| 2026-06-01 12:00 |
10:21:30.96 |
+18:43:12.8 |
HIP 50848 |
32.30 |
| 2026-06-02 00:00 |
10:21:40.49 |
+18:42:07.2 |
HIP 50848 |
31.77 |
| 2026-06-02 12:00 |
10:21:50.19 |
+18:41:00.6 |
HIP 50848 |
31.42 |
| 2026-06-03 00:00 |
10:22:00.06 |
+18:39:53.3 |
HIP 50848 |
31.28 |
| 2026-06-03 12:00 |
10:22:10.09 |
+18:38:45.0 |
HIP 50936 |
29.58 |
| 2026-06-04 00:00 |
10:22:20.29 |
+18:37:35.9 |
HIP 50936 |
26.98 |
| 2026-06-04 12:00 |
10:22:30.65 |
+18:36:26.0 |
HIP 50936 |
24.36 |
| 2026-06-05 00:00 |
10:22:41.18 |
+18:35:15.3 |
HIP 50936 |
21.71 |
| 2026-06-05 12:00 |
10:22:51.86 |
+18:34:03.7 |
HIP 50936 |
19.06 |
| 2026-06-06 00:00 |
10:23:02.71 |
+18:32:51.2 |
HIP 50936 |
16.42 |
| 2026-06-06 12:00 |
10:23:13.72 |
+18:31:38.0 |
HIP 50936 |
13.82 |
| 2026-06-07 00:00 |
10:23:24.89 |
+18:30:24.0 |
HIP 50936 |
11.33 |
| 2026-06-07 12:00 |
10:23:36.22 |
+18:29:09.1 |
HIP 50936 |
9.05 |
| 2026-06-08 00:00 |
10:23:47.71 |
+18:27:53.4 |
HIP 50936 |
7.27 |
| 2026-06-08 12:00 |
10:23:59.36 |
+18:26:36.9 |
HIP 50936 |
6.46 |
| 2026-06-09 00:00 |
10:24:11.16 |
+18:25:19.7 |
HIP 50936 |
7.02 |
| 2026-06-09 12:00 |
10:24:23.12 |
+18:24:01.6 |
HIP 50936 |
8.72 |
| 2026-06-10 00:00 |
10:24:35.23 |
+18:22:42.8 |
HIP 50936 |
11.10 |
| 2026-06-10 12:00 |
10:24:47.50 |
+18:21:23.2 |
HIP 50936 |
13.82 |
| 2026-06-11 00:00 |
10:24:59.92 |
+18:20:02.8 |
HIP 50936 |
16.75 |
| 2026-06-11 12:00 |
10:25:12.49 |
+18:18:41.6 |
HIP 50936 |
19.81 |
| 2026-06-12 00:00 |
10:25:25.22 |
+18:17:19.7 |
HIP 50936 |
22.96 |
| 2026-06-12 12:00 |
10:25:38.10 |
+18:15:57.0 |
HIP 51171 |
24.69 |
| 2026-06-13 00:00 |
10:25:51.13 |
+18:14:33.5 |
HIP 51171 |
21.31 |
| 2026-06-13 12:00 |
10:26:04.30 |
+18:13:09.3 |
HIP 51171 |
17.91 |
| 2026-06-14 00:00 |
10:26:17.63 |
+18:11:44.4 |
HIP 51171 |
14.48 |
| 2026-06-14 12:00 |
10:26:31.10 |
+18:10:18.7 |
HIP 51171 |
11.04 |
| 2026-06-15 00:00 |
10:26:44.72 |
+18:08:52.3 |
HIP 51171 |
7.62 |
| 2026-06-15 12:00 |
10:26:58.48 |
+18:07:25.1 |
HIP 51171 |
4.36 |
| 2026-06-16 00:00 |
10:27:12.39 |
+18:05:57.3 |
HIP 51171 |
2.38 |
| 2026-06-16 12:00 |
10:27:26.44 |
+18:04:28.7 |
HIP 51171 |
4.33 |
| 2026-06-17 00:00 |
10:27:40.64 |
+18:02:59.4 |
HIP 51171 |
7.68 |
| 2026-06-17 12:00 |
10:27:54.98 |
+18:01:29.4 |
HIP 51171 |
11.28 |
| 2026-06-18 00:00 |
10:28:09.45 |
+17:59:58.7 |
HIP 51318 |
12.38 |
| 2026-06-18 12:00 |
10:28:24.07 |
+17:58:27.3 |
HIP 51318 |
10.28 |
| 2026-06-19 00:00 |
10:28:38.83 |
+17:56:55.3 |
HIP 51318 |
9.31 |
| 2026-06-19 12:00 |
10:28:53.72 |
+17:55:22.5 |
HIP 51318 |
9.85 |
| 2026-06-20 00:00 |
10:29:08.75 |
+17:53:49.1 |
HIP 51318 |
11.74 |
| 2026-06-20 12:00 |
10:29:23.91 |
+17:52:15.0 |
HIP 51318 |
14.48 |
| 2026-06-21 00:00 |
10:29:39.21 |
+17:50:40.3 |
HIP 51318 |
17.71 |
| 2026-06-21 12:00 |
10:29:54.64 |
+17:49:04.9 |
HIP 51318 |
21.22 |
| 2026-06-22 00:00 |
10:30:10.21 |
+17:47:28.9 |
HIP 51318 |
24.90 |