메타데이터
| 항목 |
값 |
| Designation |
113P/Spitaler |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-04-23T18:19:34.599360Z |
| Orbit solution date (soln_date, UTC) |
2024-04-29T13:12:26Z |
| Obs used |
879 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
8.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-07-26.0000000 |
| e |
0.42451621 |
| q (au) |
2.118865 |
| a (au) |
3.681885 |
| i (deg) |
5.776267 |
| Ω (om, deg) |
14.385093 |
| ω (w, deg) |
50.026650 |
| M (ma, deg) |
13.007213 |
밝기
산란 + 전체 선형
$$
M_a = (10.379 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.379 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.854 |
| k |
0.999 |
| 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 |
| 2021-06-18 |
2022-06-01 |
+1.1076 |
-0.529 |
| 2022-06-01 |
2023-04-15 |
+5.3352 |
-1.919 |
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 |
16:26:54.55 |
-25:27:33.3 |
HIP 80673 |
18.18 |
| 2026-09-20 12:00 |
16:27:10.60 |
-25:27:41.2 |
HIP 80673 |
14.56 |
| 2026-09-21 00:00 |
16:27:26.81 |
-25:27:49.5 |
HIP 80673 |
10.91 |
| 2026-09-21 12:00 |
16:27:43.16 |
-25:27:58.1 |
HIP 80673 |
7.24 |
| 2026-09-22 00:00 |
16:27:59.67 |
-25:28:07.1 |
HIP 80673 |
3.59 |
| 2026-09-22 12:00 |
16:28:16.32 |
-25:28:16.4 |
HIP 80673 |
1.07 |
| 2026-09-23 00:00 |
16:28:33.13 |
-25:28:26.0 |
HIP 80673 |
4.25 |
| 2026-09-23 12:00 |
16:28:50.09 |
-25:28:36.0 |
HIP 80673 |
8.02 |
| 2026-09-24 00:00 |
16:29:07.19 |
-25:28:46.2 |
HIP 80673 |
11.86 |
| 2026-09-24 12:00 |
16:29:24.44 |
-25:28:56.8 |
HIP 80844 |
15.73 |
| 2026-09-25 00:00 |
16:29:41.84 |
-25:29:07.7 |
HIP 80844 |
11.82 |
| 2026-09-25 12:00 |
16:29:59.39 |
-25:29:18.9 |
HIP 80844 |
7.91 |
| 2026-09-26 00:00 |
16:30:17.07 |
-25:29:30.3 |
HIP 80844 |
4.04 |
| 2026-09-26 12:00 |
16:30:34.90 |
-25:29:42.1 |
HIP 80844 |
1.48 |
| 2026-09-27 00:00 |
16:30:52.88 |
-25:29:54.2 |
HIP 80844 |
4.56 |
| 2026-09-27 12:00 |
16:31:10.99 |
-25:30:06.6 |
HIP 80844 |
8.54 |
| 2026-09-28 00:00 |
16:31:29.25 |
-25:30:19.2 |
HIP 80844 |
12.62 |
| 2026-09-28 12:00 |
16:31:47.65 |
-25:30:32.1 |
HIP 80844 |
16.76 |
| 2026-09-29 00:00 |
16:32:06.19 |
-25:30:45.3 |
HIP 80844 |
20.94 |
| 2026-09-29 12:00 |
16:32:24.86 |
-25:30:58.8 |
HIP 80844 |
25.15 |
| 2026-09-30 00:00 |
16:32:43.68 |
-25:31:12.5 |
HIP 81146 |
22.74 |
| 2026-09-30 12:00 |
16:33:02.63 |
-25:31:26.5 |
HIP 81146 |
18.46 |
| 2026-10-01 00:00 |
16:33:21.71 |
-25:31:40.8 |
HIP 81146 |
14.15 |
| 2026-10-01 12:00 |
16:33:40.94 |
-25:31:55.3 |
HIP 81146 |
9.81 |
| 2026-10-02 00:00 |
16:34:00.30 |
-25:32:10.0 |
HIP 81146 |
5.45 |
| 2026-10-02 12:00 |
16:34:19.79 |
-25:32:25.0 |
HIP 81146 |
1.14 |
| 2026-10-03 00:00 |
16:34:39.42 |
-25:32:40.2 |
HIP 81146 |
3.45 |
| 2026-10-03 12:00 |
16:34:59.18 |
-25:32:55.7 |
HIP 81181 |
2.17 |
| 2026-10-04 00:00 |
16:35:19.07 |
-25:33:11.4 |
HIP 81181 |
5.96 |
| 2026-10-04 12:00 |
16:35:39.09 |
-25:33:27.3 |
HIP 81181 |
10.36 |
| 2026-10-05 00:00 |
16:35:59.25 |
-25:33:43.5 |
HIP 81265 |
10.95 |
| 2026-10-05 12:00 |
16:36:19.53 |
-25:33:59.8 |
HIP 81265 |
12.69 |
| 2026-10-06 00:00 |
16:36:39.95 |
-25:34:16.4 |
HIP 81265 |
15.65 |
| 2026-10-06 12:00 |
16:37:00.49 |
-25:34:33.1 |
HIP 81265 |
19.30 |
| 2026-10-07 00:00 |
16:37:21.16 |
-25:34:50.1 |
HIP 81265 |
23.33 |
| 2026-10-07 12:00 |
16:37:41.96 |
-25:35:07.3 |
HIP 81265 |
27.59 |
| 2026-10-08 00:00 |
16:38:02.88 |
-25:35:24.6 |
HIP 81265 |
32.00 |
| 2026-10-08 12:00 |
16:38:23.93 |
-25:35:42.2 |
HIP 81265 |
36.52 |
| 2026-10-09 00:00 |
16:38:45.10 |
-25:36:00.0 |
HIP 81582 |
37.67 |
| 2026-10-09 12:00 |
16:39:06.40 |
-25:36:17.8 |
HIP 81582 |
36.63 |
| 2026-10-10 00:00 |
16:39:27.82 |
-25:36:35.9 |
HIP 81582 |
36.21 |
| 2026-10-10 12:00 |
16:39:49.36 |
-25:36:54.1 |
HIP 81582 |
36.44 |
| 2026-10-11 00:00 |
16:40:11.02 |
-25:37:12.5 |
HIP 81582 |
37.32 |